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 A263260 #14 Nov 27 2015 00:18:58 %S A263260 1,3,6,11,15,20,26,30,34,38,46,50,54,59,67,74,81,88,95,103,108,114, %T A263260 120,128,138,145,153,160,167,172,177,183,189,197,203,210,217,224,228, %U A263260 233,238,244,250,258,265,270,275,281,288,299,304,308,313,321,333,340,349,354,362,370,379,389,403 %N A263260 a(n) = number of nonnegative integers k for which A155043(k) <= n; partial sums of A262507. %H A263260 Antti Karttunen, <a href="/A263260/b263260.txt">Table of n, a(n) for n = 0..10000</a> %F A263260 a(0) = 1; for n >= 1, a(n) = A262507(n) + a(n-1). %o A263260 (Scheme, with memoization-macro definec) %o A263260 (definec (A263260 n) (if (zero? n) (A262507 n) (+ (A262507 n) (A263260 (- n 1))))) %Y A263260 Cf. A000005, A049820, A155043, A262507, A263265, A263270. %K A263260 nonn %O A263260 0,2 %A A263260 _Antti Karttunen_, Nov 24 2015