%I #4 Feb 20 2022 14:52:56
%S 1,3,1,4,1,1,7,2,1,1,6,1,1,1,1,12,3,2,1,1,1,8,1,1,1,1,1,1,15,3,2,2,1,
%T 1,1,1,13,2,2,1,1,1,1,1,1,18,3,2,2,2,1,1,1,1,1
%N A051731 * A130296.
%C Row sums = A129235, (1, 4, 6, 11, 10, 20, 14, ...).
%C Left column = sigma(n), A000203.
%F Inverse Moebius transform of A130296.
%e First few rows of the triangle:
%e 1;
%e 3, 1;
%e 4, 1, 1;
%e 7, 2, 1, 1;
%e 6, 1, 1, 1, 1;
%e 12, 3, 2, 1, 1, 1;
%e 8, 1, 1, 1, 1, 1, 1;
%e ...
%Y Cf. A130296, A051731, A129235, A000203.
%K nonn
%O 0,2
%A _Gary W. Adamson_, May 20 2007