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 A120206 #7 May 23 2025 16:22:48
%S A120206 5,6,6,7,8,9,10,11,12,13,15,16,18,20,22,25,28,31,34,38,42,47,52,58,64,
%T A120206 71,79,88,98,109,121,134,149,166,184,205,227,253,281,312
%N A120206 a(1)=5; a(n)=floor((49+sum(a(1) to a(n-1)))/9).
%H A120206 Harvey P. Dale, <a href="/A120206/b120206.txt">Table of n, a(n) for n = 1..1000</a>
%t A120206 nxt[{t_,a_}]:=With[{c=Floor[(49+t)/9]},{t+c,c}]; NestList[nxt,{5,5},40][[;;,2]] (* _Harvey P. Dale_, May 23 2025 *)
%Y A120206 Cf. A073941, A112088, A072493.
%K A120206 nonn
%O A120206 1,1
%A A120206 _Graeme McRae_, Jun 10 2006