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 A120188 #2 Mar 30 2012 18:34:45 %S A120188 3,3,4,4,5,6,6,7,8,9,11,12,14,16,18,21,24,27,31,36,41,47,53,61,70,80, %T A120188 91,104,119,136,155,177,203,232,265,303,346,395,452,516 %N A120188 a(1)=3; a(n)=floor((23+sum(a(1) to a(n-1)))/7). %Y A120188 Cf. A073941, A112088, A072493. %K A120188 nonn %O A120188 1,1 %A A120188 _Graeme McRae_, Jun 10 2006