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 A328810 #15 Oct 29 2019 06:06:56
%S A328810 1,3,11,93,2583,260613,99915029,144072750195,808177412109895,
%T A328810 16892305881120020613,1388286655114683125139201,
%U A328810 423109739462061163278604529475,511885816860737850466697173188711669,2296554708428991868313593456071099604464483
%N A328810 a(n) = Sum_{i=0..n} binomial(n,i)*Sum_{j=0..i} binomial(i,j)^n.
%H A328810 Seiichi Manyama, <a href="/A328810/b328810.txt">Table of n, a(n) for n = 0..59</a>
%F A328810 a(n) ~ A167010(n). - _Vaclav Kotesovec_, Oct 28 2019
%t A328810 Table[Sum[Binomial[n, i]*Sum[Binomial[i, j]^n, {j, 0, i}], {i, 0, n}], {n, 0, 15}] (* _Vaclav Kotesovec_, Oct 28 2019 *)
%o A328810 (PARI) {a(n) = sum(i=0, n, binomial(n, i)*sum(j=0, i, binomial(i, j)^n))}
%Y A328810 Main diagonal of A328807.
%Y A328810 Cf. A167010, A328811.
%K A328810 nonn
%O A328810 0,2
%A A328810 _Seiichi Manyama_, Oct 28 2019