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 A263274 #8 Nov 09 2015 16:14:36 %S A263274 1,1,2,1,2,1,3,1,2,2,3,3,4,3,4,4,5,2,5,1,6,2,6,1,3,4,5,1,6,1,7,1,5,2, %T A263274 8,1,2,1,7,2,7,1,9,1,6,2,10,2,7,8,8,1,9,1,11,2,9,1,12,1,10,1,13,2,3,1, %U A263274 10,1,11,2,14,1,4,1,12,2,13,1,15,1,14,8,15,11,3,12,9,5,10,4,16,5,13,2 %N A263274 One-based column index to array A263255. %H A263274 Antti Karttunen, <a href="/A263274/b263274.txt">Table of n, a(n) for n = 0..10002</a> %F A263274 Other identities. For all n >= 0: %F A263274 a(A259934(n)) = n+1. %o A263274 (Scheme) %o A263274 (define (A263274 n) (let ((rowf (rowfun-for-A263255 (A263254 n)))) (let loop ((i 1)) (if (= n (rowf i)) i (loop (+ 1 i)))))) %o A263274 ;; rowfun-for-A263255 given in A263255. %Y A263274 Cf. A259934, A263254, A263255. %Y A263274 Cf. also A263275. %K A263274 nonn %O A263274 0,3 %A A263274 _Antti Karttunen_, Nov 07 2015