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 A386687 #8 Jul 30 2025 17:49:15
%S A386687 0,1,3,5,7,9,15,21,27,33,39,45,51,57,63,69,75,81,99,117,135,153,171,
%T A386687 189,207,225,251,277,303,329,355,381,407,433,459,485,511,537,563,589,
%U A386687 615,641,667,693,719,745,771,797,823,849,875,901,927,953,979,1005,1031,1057,1083,1109
%N A386687 Partial sums of A386369.
%H A386687 Paolo Xausa, <a href="/A386687/b386687.txt">Table of n, a(n) for n = 1..10000</a>
%F A386687 a(n) = Sum_{k=1..n} A386369(k).
%t A386687 Module[{s = 0, a = 0},Table[If[IntegerQ[Sqrt[s += a]], a = n]; s, {n, 100}]]
%Y A386687 Cf. A386369, A386370, A386688.
%K A386687 nonn,easy
%O A386687 1,3
%A A386687 _Paolo Xausa_, Jul 29 2025