The number 45 is the first integer in having this interesting property:
the sum of the number with its reversed is divisible by the difference between them(absolute Value).
```
45 + 54 = 99 
abs(45 - 54) = 9
99 is divisible by 9.
```
The first terms of this special sequence are :
```
n               a(n)
1               45
2               54
3               495
4               594
```
Make the function ```sum_dif_rev()```(`sumDivRef` in JavaScript and CoffeeScript), that receives ```n```, the ordinal number of the term and may give us, the value of the term of the sequence.
```python
sum_dif_rev(n) -----> a(n)
```
Let's see some cases:
```python
sum_dif_rev(1) -----> 45
sum_dif_rev(3) -----> 495
```
"Important: Do not include numbers which, when reversed, have a leading zero, e.g.: 1890 reversed is 0981, so 1890 should not be included."

Your code will be tested up to the first 65 terms, so you should think to optimize it as much as you can.

(Hint: I memoize, you memoize, he memoizes, ......they (of course) memoize)

Happy coding!!

```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 = 'seq = [] \ndef sum_dif_rev(n):\n    i = seq[-1] if seq else 0 \n    while len(seq) < n:\n        i += 9\n        r = int(str(i)[::-1])\n        if i % 10 and r != i and (r+i) % abs(r-i) == 0:\n            seq.append(i)\n    return seq[n-1]'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'sum_dif_rev'
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: 5680