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 A235044 #6 Jan 16 2014 15:04:40 %S A235044 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1, %T A235044 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2, %U A235044 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,4 %N A235044 Partial sums of the characteristic function of A091214. %C A235044 Note that this also works as an inverse function of A091214 in a sense that a(A091214(n)) = n for all n>=1. %H A235044 Antti Karttunen, <a href="/A235044/b235044.txt">Table of n, a(n) for n = 0..4119</a> %o A235044 (Scheme) (definec (A235044 n) (if (zero? n) n (+ (A235044 (- n 1)) (+ (* (A066247 n) (A091225 n)))))) %Y A235044 Used to compute A235042. Cf. A066247, A091225, A235043. %K A235044 nonn %O A235044 0,56 %A A235044 _Antti Karttunen_, Jan 02 2014