Add more OEIS sequences

[siriak]

Feel free to propose and/or implement new sequences, I will add them to the list below :) List of some interesting OEIS sequences that would be great to see in this repo (but you can implement any one from OEIS, not only from this list):

• [x] A000004 Zero
• [x] A000005 Number of Divisors of n
• [x] A000008 Number of ways of making change for n cents using coins of 1, 2, 5, 10 cents
• [x] A000010 Euler totient function of n

[deljohnson1]

I'm working on:

A000009 Strict Partition sequence A000041 Partition sequence A000110 Bell sequence A000111 Euler Zig Zag sequence A000129 Pell sequence A000166 Derangement sequence A000217 Triangular sequence A001003 Small Schröder sequence A001006 Motzkin sequence A001045 Jacobsthal sequence A002203 Companion Pell sequence A002378 Pronic sequence A002487 Sterns Diatomic sequence A002559 Markov sequence A002858 Ulam sequence A003261 Woodall sequence A003601 Arithmetic sequence A006318 Large Schröder sequence A138591 Polite sequence A328152 Squares on Grid sequence

[siriak]

The original list was implemented, feel free to open an issue for other sequences