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 A256446 #9 Mar 29 2015 22:58:39 %S A256446 2,4,9,12,12,18,17,36,32,34,50,33,31,60,77,57,58,77,49,66,89,90,136, %T A256446 132,65,61,63,70,211,240,132,105,167,183,121,180,161,164,191,138,215, %U A256446 215,109,108,263,462,336,126,122,209,183,262,354,281,270,199,192,249,139,312,605,495,156,162,492,562,458,359,178,302,424,443,377,306 %N A256446 First differences of A250477: a(n) = A250477(n+1) - A250477(n). %H A256446 Antti Karttunen, <a href="/A256446/b256446.txt">Table of n, a(n) for n = 1..563</a> %F A256446 a(n) = A250477(n+1) - A250477(n). %F A256446 a(n) = A256447(n+1) + A256448(n). %o A256446 (Scheme) (define (A256446 n) (- (A250477 (+ n 1)) (A250477 n))) %Y A256446 Cf. A250477, A251723, A256447, A256448. %K A256446 nonn %O A256446 1,1 %A A256446 _Antti Karttunen_, Mar 29 2015