###Task:

You have to write a function **pattern** which creates the following Pattern(See Examples) upto n(parameter) number of rows.

####Rules/Note:
* If the Argument is 0 or a Negative Integer then it should return "" i.e. empty string.
* All the lines in the pattern have same length i.e equal to the number of characters in the last line.
* Range of n is (-∞,100]

###Examples:

pattern(5):

        1    
       121   
      12321  
     1234321 
    123454321


pattern(10):

             1         
            121        
           12321       
          1234321      
         123454321     
        12345654321    
       1234567654321   
      123456787654321  
     12345678987654321 
    1234567890987654321

pattern(15):

                  1              
                 121             
                12321            
               1234321           
              123454321          
             12345654321         
            1234567654321        
           123456787654321       
          12345678987654321      
         1234567890987654321     
        123456789010987654321    
       12345678901210987654321   
      1234567890123210987654321  
     123456789012343210987654321 
    12345678901234543210987654321

pattern(20):

                       1                   
                      121                  
                     12321                 
                    1234321                
                   123454321               
                  12345654321              
                 1234567654321             
                123456787654321            
               12345678987654321           
              1234567890987654321          
             123456789010987654321         
            12345678901210987654321        
           1234567890123210987654321       
          123456789012343210987654321      
         12345678901234543210987654321     
        1234567890123456543210987654321    
       123456789012345676543210987654321   
      12345678901234567876543210987654321  
     1234567890123456789876543210987654321 
    123456789012345678909876543210987654321

###Amazing Fact: 


```Hint: Use \n in string to jump to next line```

```python

USER_FILENAME = "<user_code>"
import sys, json, builtins
import math, heapq, bisect, itertools, functools, collections, statistics, fractions, decimal, operator, array, random, re, string, os, pathlib
try:
    import resource as _res
except Exception:
    _res = None
from collections import Counter, defaultdict, deque, OrderedDict
from functools import lru_cache, reduce
from itertools import accumulate, permutations, combinations, product
from math import gcd, ceil, floor, sqrt
from decimal import Decimal
try:
    from typing import *
except Exception:
    pass
try:
    sys.setrecursionlimit(1_000_000)
except Exception:
    pass
try:
    import site as _site
    try:
        _sys_sites = _site.getsitepackages() if hasattr(_site, "getsitepackages") else []
        for _p in _sys_sites:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
    try:
        _usp = _site.getusersitepackages()
        if isinstance(_usp, str):
            _usp = [_usp]
        for _p in _usp:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
except Exception:
    pass

def _disabled_input(*args, **kwargs):
    raise RuntimeError("input() is disabled in callable mode")
builtins.input = _disabled_input

ns = {"__name__": "__judge__"}  # prevent if __name__ == "__main__" blocks
for _k, _v in list(globals().items()):
    if not _k.startswith("_"):
        ns[_k] = _v
_CODE = 'def pattern(n):\n    t = []\n    for i in range(1,n+1):\n        t.append( (n-i)*" " + ls(i)+ +(n-i)*" ")\n    return "\\n".join(t)\n    \ndef ls(k):\n    ls = [str(j%10) for j in range(1,k)]\n    return "".join(ls) + str(k%10) + "".join(ls[::-1])'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'pattern'
if _fn_name:
    if "Solution" in ns:
        try:
            _obj = ns["Solution"]()
            if hasattr(_obj, _fn_name):
                _target = getattr(_obj, _fn_name)
        except Exception:
            _target = None
    if _target is None and _fn_name in ns and callable(ns[_fn_name]):
        _target = ns[_fn_name]
# Fallback: if there's exactly one user-defined function, use it
if _target is None:
    _cands = [v for k, v in ns.items() if callable(v) and getattr(v, "__module__", "") in ("__judge__", "__main__")]
    _user_funcs = [c for c in _cands if getattr(c, "__name__", "").startswith("_") is False]
    if len(_user_funcs) == 1:
        _target = _user_funcs[0]
if _target is None:
    raise RuntimeError(f"Could not resolve callable '{_fn_name}'")

_raw = sys.stdin.read().strip()
if _raw:
    _parsed = json.loads(_raw)
    if isinstance(_parsed, dict):
        _kwargs = _parsed.get("kwargs", {})
        _args = _parsed.get("args", [])
    else:
        _args, _kwargs = _parsed, {}
else:
    _args, _kwargs = [], {}
if not isinstance(_args, (list, tuple)):
    _args = [_args]
_res = _target(*_args, **_kwargs)
try:
    sys.stdout.write(repr(_res) + "\n")
except Exception:
    pass

```

Measured memory_bytes: 6744