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%I #2 Mar 30 2012 17:25:22
%S 1,1,1,1,4,1,1,6,6,1,1,9,12,9,1,1,11,23,23,11,1,1,14,34,52,34,14,1,1,
%T 16,51,90,90,51,16,1,1,19,67,152,180,152,67,19,1,1,21,90,225,342,342,
%U 225,90,21,1
%N 3*A007318 - A046854 - A065941.
%C Row sums = A074878: (1, 2, 6, 14, 32, 70, 150,...).
%F 3*A007318 - A046854 - A065941 as infinite lower triangular matrices.
%e First few rows of the triangle are:
%e 1;
%e 1, 1;
%e 1, 4, 1;
%e 1, 6, 6, 1;
%e 1, 9, 12, 9, 1;
%e 1, 11, 23, 23, 11, 1;
%e 1, 14, 34, 52, 34, 14, 1;
%e 1, 16, 51, 90, 90, 51, 16, 1;
%e ...
%Y Cf. A007318, A046854, A065941, A074878.
%K nonn,tabl
%O 0,5
%A _Gary W. Adamson_, Jul 05 2007
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