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%I #4 Mar 27 2022 19:07:52
%S 1,0,1,2,0,2,0,6,0,6,24,0,24,0,24,0,120,0,120,0,120,720,0,720,0,720,0,
%T 720,0,5040,0,5040,0,5040,0,5040
%N Triangle read by rows: A136572 * A128174.
%C Row sums = A052558: (1, 1, 4, 12, 72, 360, ...).
%F A136572 * A128174 as infinite lower triangular matrices.
%e First few rows of the triangle:
%e 1;
%e 0, 1;
%e 2, 0, 2;
%e 0, 6, 0, 6;
%e 24, 0, 24, 0, 24;
%e 0, 120, 0, 120, 0, 120;
%e ...
%Y Cf. A000142, A052558, A128174, A136572.
%K nonn,tabl
%O 0,4
%A _Gary W. Adamson_, Jan 09 2008
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