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%I #4 Feb 18 2022 22:34:58
%S 1,0,1,1,1,1,0,2,1,1,1,2,3,1,1,0,3,4,3,1,1,1,3,7,5,3,1,1,0,4,9,10,5,3,
%T 1,11,4,13,16,11,5,3,1,1,0,5,16,26,20,11,5,3,1,1
%N A000012(signed) * A052509.
%C Row sums = A052952: (1, 1, 3, 4, 8, 12, 21, 33, ...). A131257 = A052509 * A000012(signed).
%F A000012(signed) * A052509, where the signed version of A000012 = (1; -1,1; 1,-1,1; ...).
%e First few rows of the triangle:
%e 1;
%e 0, 1;
%e 1, 1, 1;
%e 0, 2, 1, 1;
%e 1, 2, 3, 1, 1;
%e 0, 3, 4, 3, 1, 1;
%e 1, 3, 7, 5, 3, 1, 1;
%e ...
%Y Cf. A052509, A000012, A131257.
%K nonn,tabl
%O 0,8
%A _Gary W. Adamson_, Jun 23 2007
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