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 A280503 #9 Jan 10 2017 19:14:06 %S A280503 1,2,3,2,5,2,7,2,9,10,1,12,1,2,15,2,17,2,1,2,21,2,3,4,1,2,27,4,3,2,31, %T A280503 2,33,6,7,18,1,38,5,6,1,42,3,2,45,6,1,12,7,2,51,52,3,18,1,56,5,6,1,12, %U A280503 1,2,63,2,65,2,1,2,1,2,3,2,73,2,15,2,3,2,7,2,1,2,9,2,85,2,1,2,3,2,1,2,93,2,5,4,1,2,99,4,9,2,1,4,15,2,107,4,1,2,3,8 %N A280503 a(n) = A091255(n,A056539(n)). %H A280503 Antti Karttunen, <a href="/A280503/b280503.txt">Table of n, a(n) for n = 1..8192</a> %H A280503 <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a> %F A280503 a(n) = A091255(n,A056539(n)). %F A280503 Other identities. For all n >= 1: %F A280503 a(A056539(n)) = a(n). %F A280503 A048720(a(n), A280504(n)) = n. %o A280503 (Scheme) (define (A280503 n) (A091255bi n (A056539 n))) ;; A091255bi implements the 2-argument GF(2)[X] GCD-function (A091255). %Y A280503 Cf. A048720, A056539, A091255, A280502, A280505. %K A280503 nonn,base %O A280503 1,2 %A A280503 _Antti Karttunen_, Jan 09 2017