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 A350008 #17 Dec 09 2021 05:27:07
%S A350008 1,2,18,747,66283,9831908,2186614244,680409687093,282155386397749,
%T A350008 150376790683396870,100150376790683396870,81502899763630444510191,
%U A350008 79578350103154474577951727,91812908543371771132977567736
%N A350008 a(n) = Sum_{k=0..n} k^(2*k).
%C A350008 Partial sums of A062206.
%H A350008 Seiichi Manyama, <a href="/A350008/b350008.txt">Table of n, a(n) for n = 0..214</a>
%F A350008 a(n) ~ n^(2*n). - _Vaclav Kotesovec_, Dec 08 2021
%t A350008 a[n_] := Sum[If[k == 0, 1, k^(2*k)], {k, 0, n}]; Array[a, 14, 0] (* _Amiram Eldar_, Dec 08 2021 *)
%o A350008 (PARI) a(n) = sum(k=0, n, k^(2*k));
%Y A350008 Cf. A000330, A062206, A062970, A100262, A249459, A349962.
%K A350008 nonn
%O A350008 0,2
%A A350008 _Seiichi Manyama_, Dec 08 2021