Let's take an integer number, ``` start``` and let's do the iterative process described below:

- we take its digits and raise each of them to a certain power, ```n```, and add all those values up. (result = ```r1```)

- we repeat the same process with the value ```r1``` and so on, ```k``` times.

Let's do it with ```start = 420, n = 3, k = 5```

```
420 ---> 72 (= 4³ + 2³ + 0³) ---> 351 (= 7³ + 2³) ---> 153 ---> 153 ----> 153
```

We can observe that it took ```3``` steps to reach a cyclical pattern ```[153]```(```h = 3```). The length of this cyclical pattern is ```1```, ```patt_len```. The last term of our k operations is 153, ```last_term```

Now, ```start = 420, n = 4, k = 30```

```
420 ---> 272 ---> 2433 ---> 434 ---> 593 ---> 7267 --->
6114 ---> 1554 ---> 1507 ---> 3027 ---> 2498 ---> 10929 --->
13139 ---> 6725 ---> 4338 ---> 4514 ---> 1138 ---> 4179 ---> 9219 ---> 
13139 ---> 6725 ---> 4338 ---> 4514 ---> 1138 ---> 4179 ---> 9219 ---> 
13139 ---> 6725 ---> 4338 ---> 4514 ---> 1138 ---> 4179 ---> 9219......
```

In this example we can observe that the cyclical pattern (```cyc_patt_arr```) is ```[13139, 6725, 4338, 4514, 1138, 4179, 9219]``` with a length of ```7```, (```patt_len = 7```), and it took ```12``` steps (```h = 12```) to reach the cyclical pattern. The last term after doing ```30``` operations is ```1138```

Make the function ```sum_pow_dig_seq()```, that receives the arguments in the order shown below with the corresponding output:
```python
sum_pow_dig_seq(start, n, k) ---> [h, cyc_patt_arr, patt_len, last_term]
```

For our given examples, 
```python
sum_pow_dig_seq(420, 3, 5) == [3, [153], 1, 153]

sum_pow_dig_seq(420, 4, 30) == [12, [13139, 6725, 4338, 4514, 1138, 4179, 9219], 7, 1138]
```

Constraints for tests:
```
500 ≤ start ≤ 8000
2 ≤ n ≤ 9
100 * n ≤ k ≤ 200 * n
```
Do your best!

```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 sum_pow_dig_seq(start, n, k):\n    seen = [start]\n    for i in range(k):\n        r1 = sum(map(lambda x: x**n, map(int,str(seen[-1]))))\n        if r1 in seen: #Cycle detected.\n            h = seen.index(r1)\n            cyc_patt_arr = seen[h:]\n            patt_len = len(seen) - h\n            last_term = cyc_patt_arr[(k-i-1)%patt_len]\n            break\n        seen.append(r1)\n        \n    return [h, cyc_patt_arr, patt_len, last_term]'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'sum_pow_dig_seq'
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: 6062