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 A349906 #10 Dec 15 2021 17:38:01 %S A349906 1,1,0,2,0,1,0,3,0,1,0,2,0,1,0,5,0,1,0,2,0,1,0,4,0,1,0,2,0,1,0,7,0,1, %T A349906 0,3,0,1,0,4,0,1,0,2,0,1,0,7,0,1,0,2,0,1,0,4,0,1,0,3,0,1,0,11,0,1,0,2, %U A349906 0,1,0,6,0,1,0,2,0,1,0,7,0,1,0,3,0,1,0,4,0,1,0,2,0,1,0,12,0,1,0,3,0,1,0,4,0 %N A349906 Number of factorizations of n into even factors > 1 (a(1) = 1 by convention). %H A349906 Antti Karttunen, <a href="/A349906/b349906.txt">Table of n, a(n) for n = 1..20000</a> %o A349906 (PARI) A349906(n, m=n) = if(1==n, 1, my(s=0); fordiv(n, d, if((d>1)&&(d<=m)&&!(d%2), s += A349906(n/d, d))); (s)); %Y A349906 Cf. A001055, A340785 (even bisection), A349907. %K A349906 nonn %O A349906 1,4 %A A349906 _Antti Karttunen_, Dec 13 2021