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 A258007 #5 Jun 05 2015 22:03:56 %S A258007 3,19,3,19,3,19,3,19,3,13,6,3,13,6,3,13,6,3,13,6,3,3,10,6,3,3,10,6,3, %T A258007 3,16,3,3,16,3,3,19,3,7,12,3,19,3,7,12,3,19,3,19,3,19,3,19,3,13,6,3, %U A258007 13,6,3,13,6,3,13,6,3,3,10,6,3,3,10,6,3,3,16,3,3,16,3,3,19,3,7,12,3,19,3,19,3,19,3,19,3,19,3,19,3,13,6 %N A258007 First differences of A258203. %H A258007 Antti Karttunen, <a href="/A258007/b258007.txt">Table of n, a(n) for n = 1..10000</a> %F A258007 a(n) = A258203(n+1) - A258203(n). %o A258007 (Scheme) (define (A258007 n) (- (A258203 (+ 1 n)) (A258203 n))) %Y A258007 Differs from A258200 for the first time at n=13. %Y A258007 Cf. A258006, A258203. %K A258007 nonn %O A258007 1,1 %A A258007 _Antti Karttunen_ after _V.J. Pohjola_'s amazing A258200, Jun 05 2015