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 A120148 #11 May 31 2023 18:53:37
%S A120148 25,37,56,84,126,189,283,425,637,956,1434,2151,3226,4839,7259,10888,
%T A120148 16332,24498,36747,55121,82681,124022,186033,279049,418574,627861,
%U A120148 941791,1412687,2119030,3178545,4767818,7151727,10727590,16091385
%N A120148 a(n) = 25 + floor( Sum_{j=1..n-1} a(j)/2 ).
%H A120148 Harvey P. Dale, <a href="/A120148/b120148.txt">Table of n, a(n) for n = 1..1000</a>
%t A120148 nxt[{t_,a_}]:=Module[{c=25+Floor[t/2]},{t+c,c}]; NestList[nxt,{25,25},40][[;;,2]] (* _Harvey P. Dale_, May 17 2023 *)
%o A120148 (SageMath)
%o A120148 @CachedFunction
%o A120148 def A120148(n): return 25 + sum(A120148(k) for k in range(1, n))//2
%o A120148 [A120148(n) for n in range(1, 61)] # _G. C. Greubel_, May 31 2023
%Y A120148 Cf. A072493, A073941, A112088.
%K A120148 nonn
%O A120148 1,1
%A A120148 _Graeme McRae_, Jun 10 2006