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 A171388 #9 Feb 03 2023 04:53:29
%S A171388 1,2,0,5,0,0,12,1,0,0,30,4,1,0,0,74,17,4,1,0,0,185,56,21,4,1,0,0,460,
%T A171388 185,74,26,4,1,0,0
%N A171388 Expansion of the first column of triangle T_(2,x), T_(x,y) defined in A039599; T_(2,0)= A126075, T_(2,1)= A038622, T_(2,2)= A039598, T_(2,3)= A124733, T_(2,4)= A124575.
%F A171388 Sum_{k=0..n} T(n,k)*x^k = A054341(n), A005773(n+1), A000108(n+1), A007317(n), A033543(n) for x = 0, 1, 2, 3, 4 respectively.
%e A171388 Triangle begins:
%e A171388 1;
%e A171388 2, 0;
%e A171388 5, 0, 0;
%e A171388 12, 1, 0, 0;
%e A171388 30, 4, 1, 0, 0;
%e A171388 74, 17, 4, 1, 0, 0;
%e A171388 ...
%Y A171388 Cf. A000108, A171368, A171380.
%K A171388 nonn,tabl,more
%O A171388 0,2
%A A171388 _Philippe Deléham_, Dec 07 2009