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 A037262 #9 Jul 08 2025 22:06:21 %S A037262 4,11,19,29,41,54,68,83,99,117,137,158,180,203,227,252,279,307,337, %T A037262 368,400,433,467,502,539,577,616,656,698,741,785,830,876,923,971,1020, %U A037262 1070,1121,1173,1226,1281,1337,1394,1452,1511,1571,1632,1695,1759,1825,1892 %N A037262 Second differences of A037260. %Y A037262 Cf. A037261, A037263. %K A037262 nonn,easy %O A037262 0,1 %A A037262 _N. J. A. Sloane_ %E A037262 More terms from Larry Reeves (larryr(AT)acm.org), Sep 25 2000