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%I #9 Feb 03 2023 04:53:29
%S 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 185,74,26,4,1,0,0
%N 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 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 Triangle begins:
%e 1;
%e 2, 0;
%e 5, 0, 0;
%e 12, 1, 0, 0;
%e 30, 4, 1, 0, 0;
%e 74, 17, 4, 1, 0, 0;
%e ...
%Y Cf. A000108, A171368, A171380.
%K nonn,tabl,more
%O 0,2
%A _Philippe Deléham_, Dec 07 2009