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 A318312 #5 Aug 30 2018 08:37:50 %S A318312 1,2,2,4,2,4,2,8,4,4,2,8,2,4,4,32,2,8,2,8,4,4,2,16,4,4,8,8,2,8,2,128, %T A318312 4,4,4,16,2,4,4,16,2,8,2,8,8,4,2,64,4,8,4,8,2,16,4,16,4,4,2,16,2,4,8, %U A318312 2048,4,8,2,8,4,8,2,32,2,4,8,8,4,8,2,64,32,4,2,16,4,4,4,16,2,16,4,8,4,4,4,256,2,8,8,16,2,8,2,16,8,4,2,32,2,8,4,64 %N A318312 Multiplicative with a(p^e) = 2^A000041(e). %H A318312 Antti Karttunen, <a href="/A318312/b318312.txt">Table of n, a(n) for n = 1..16384</a> %H A318312 <a href="/index/Eu#epf">Index entries for sequences computed from exponents in factorization of n</a> %F A318312 a(n) = 2^A008481(n). %o A318312 (PARI) A318312(n) = factorback(apply(e -> 2^numbpart(e),factor(n)[,2])); %Y A318312 Cf. A000041, A008481. %Y A318312 Differs from A318474 for the first time at n=32, where a(32) = 128, while A318474(32) = 256. %K A318312 nonn,mult %O A318312 1,2 %A A318312 _Antti Karttunen_, Aug 30 2018