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 A328811 #16 Oct 29 2019 06:06:32
%S A328811 1,1,3,31,1255,161671,75481581,121338954577,734884394666535,
%T A328811 15970479086714049751,1347242827078365957146473,
%U A328811 415839472158527880691583531617,507266883682599825619985300960971525,2284735689605775548174387143718048664963601
%N A328811 a(n) = Sum_{i=0..n} (-1)^(n-i)*binomial(n,i)*Sum_{j=0..i} binomial(i,j)^n.
%H A328811 Seiichi Manyama, <a href="/A328811/b328811.txt">Table of n, a(n) for n = 0..59</a>
%F A328811 a(n) ~ A167010(n). - _Vaclav Kotesovec_, Oct 28 2019
%t A328811 Table[Sum[(-1)^(n-i)*Binomial[n, i]*Sum[Binomial[i, j]^n, {j, 0, i}], {i, 0, n}], {n, 0, 15}] (* _Vaclav Kotesovec_, Oct 28 2019 *)
%o A328811 (PARI) {a(n) = sum(i=0, n, (-1)^(n-i)*binomial(n, i)*sum(j=0, i, binomial(i, j)^n))}
%Y A328811 Main diagonal of A328747.
%Y A328811 Cf. A167010, A328810.
%K A328811 nonn
%O A328811 0,3
%A A328811 _Seiichi Manyama_, Oct 28 2019