We define the sequence ```SF``` in the following way in terms of four previous sequences: ```S1```, ```S2```, ```S3``` and ```ST```



We are interested in collecting the terms of SF that are multiple of ten.

The first term multiple of ten of this sequence is  ```60```

Make the function ```find_mult10_SF()``` that you introduce the ordinal number of a term multiple of 10 of SF and gives us the value of this term.

Let's see some cases: 
```python
find_mult10_SF(1) == 60

find_mult10_SF(2) == 70080

find_mult10_SF(3) ==  90700800
```
``` haskell
findMult10SF 1 `shouldBe` 60
findMult10SF 2 `shouldBe` 70080
findMult10SF 3 `shouldBe` 90700800
```
Memoization is advisable to have a more agile code for tests.

Your code will be tested up to the 300-th term, multiple of 10.

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 = 's1 = lambda n : 1 + 2 ** n + 3 ** n\ns2 = lambda n : 1 + 2 ** n + 4 ** n\ns3 = lambda n : 1 + 2 ** n + 3 ** n + 4 ** n + 5 ** n + 6 ** n\nst = lambda n : s3(n) - s2(n) - s1(n)\nsf = lambda n : (st(n+1) - 5 * st(n) - 4) / 4\n\nmem = []\n\ndef find_mult10_SF(n):\n    x = mem[-1][0] + 1 if mem else 1\n    while len(mem) < n:\n        s = sf(x)\n        while s % 10 != 0:\n            x += 1\n            s = sf(x)\n        mem.append((x,s))\n        x += 1\n    return mem[n - 1][1]'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'find_mult10_SF'
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: 6026