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%I #5 Mar 23 2022 01:06:45
%S 1,3,1,6,5,1,11,12,7,1,20,24,20,9,1,37,45,45,30,11,1,70,83,91,76,42,
%T 13,1,135,154,175,168,119,56,15,1,264,290,330,344,288,176,72,17,1,521,
%U 555,621,675,633,465,249,90,19,1
%N (A000012 * A007318 - A007318 * A000012) - A000012.
%C Row sums = A133546: (1, 4, 12, 31, 74, 169, ...).
%C Left border = A006127: (1, 3, 6, 11, 20, ...).
%F (A000012 * A007318 - A007318 * A000012) - A000012 as infinite lower triangular matrices.
%e First few rows of the triangle:
%e 1;
%e 3, 1;
%e 6, 5, 1;
%e 11, 12, 7, 1;
%e 20, 24, 20, 9, 1;
%e 37, 45, 45, 30, 11, 1;
%e 70, 83, 91, 76, 42, 13, 1;
%e ...
%Y Cf. A000012, A007318, A133546, A006127.
%K nonn,tabl
%O 1,2
%A _Gary W. Adamson_, Sep 15 2007
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