This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A255201 #15 Mar 11 2017 03:41:54
%S A255201 0,2,2,4,2,4,2,6,4,4,2,6,2,4,4,8,2,6,2,6,4,4,2,8,4,4,6,6,2,6,2,10,4,4,
%T A255201 4,8,2,4,4,8,2,6,2,6,6,4,2,10,4,6,4,6,2,8,4,8,4,4,2,8,2,4,6,12,4,6,2,
%U A255201 6,4,6,2,10,2,4,6,6,4,6,2,10,8,4,2,8,4,4,4,8,2,8,4,6,4,4,4,12
%N A255201 Number of prime factors of n^2.
%C A255201 a(n) = 2 if n is prime.
%C A255201 All terms are even.
%C A255201 Record values are 2(m-1) for n = 2^m, m >= 0.
%H A255201 Indranil Ghosh, <a href="/A255201/b255201.txt">Table of n, a(n) for n = 1..1000</a>
%F A255201 a(n) = A001222(n^2) = A001222(A000290(n)) = 2*A001222(n).
%t A255201 Table[PrimeOmega[n^2], {n, 1000}] (* _Indranil Ghosh_, Mar 11 2017 *)
%o A255201 (PARI) a(n) = bigomega(n^2); \\ _Michel Marcus_, Feb 17 2015
%Y A255201 Cf. A000290, A001222.
%K A255201 nonn
%O A255201 1,2
%A A255201 _Zak Seidov_, Feb 17 2015