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 A120205 #9 Aug 30 2025 06:18:18
%S A120205 4,4,5,5,6,7,7,8,9,10,11,12,14,15,17,19,21,23,26,29,32,35,39,44,49,54,
%T A120205 60,67,74,82,91,102,113,125,139,155,172,191,212,236,262,291,324,360,
%U A120205 400,444,493,548,609,677,752,835,928,1031,1146,1273,1415,1572
%N A120205 a(1) = 4; a(n) = floor((39 + Sum_{i=1..n-1} a(i))/9).
%t A120205 Module[{ll={4}},Do[AppendTo[ll,Floor[(39+Total[ll])/9]],{60}];ll] (* _Harvey P. Dale_, May 07 2012 *)
%Y A120205 Cf. A073941, A112088, A072493.
%K A120205 nonn,changed
%O A120205 1,1
%A A120205 _Graeme McRae_, Jun 10 2006
%E A120205 More terms from _Harvey P. Dale_, May 07 2012