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 A322514 #11 Dec 13 2018 19:07:28
%S A322514 1,2,35,1624,169653,30961656,8792309747,3592089777760,
%T A322514 1998565555891049,1454040182726241040,1340732073013968993771,
%U A322514 1528443066775450331625912,2111332024387378632991315275,3475577885419591506890414078832
%N A322514 a(n) = [x^(n^2)] (Sum_{k=0..2*n} (k+1)*x^k)^n.
%t A322514 f[n_] := Coefficient[Expand[Sum[(k+1)*x^k ,{k, 0, 2n}]^n, x], x, n^2]; Array[f, 15, 0] (* _Amiram Eldar_, Dec 13 2018 *)
%o A322514 (PARI) {a(n) = polcoeff((sum(k=0, 2*n, (k+1)*x^k))^n, n^2, x)}
%Y A322514 Cf. A084609, A286928.
%K A322514 nonn
%O A322514 0,2
%A A322514 _Seiichi Manyama_, Dec 13 2018