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%I #4 Feb 26 2022 00:36:34
%S 1,3,1,3,3,1,3,6,3,1,3,6,9,3,1,3,9,9,12,3,1,3,9,18,12,15,3,1,3,12,18,
%T 30,15,18,3,1,3,12,30,30,45,18,21,3,1,3,15,30,60,45,63,21,24,3,1
%N 3*A046854 - 2*I.
%C Row sums = A111314: (1, 4, 7, 13, 22, 37, ...). A131240 = 2*A046854 - I.
%F 3*A046854 - 2*I, where A046854 = Pascal's triangle with repeats by columns and I = Identity matrix.
%e First few rows of the triangle:
%e 1;
%e 3, 1;
%e 3, 3, 1;
%e 3, 6, 3, 1;
%e 3, 6, 9, 3, 1;
%e 3, 9, 9, 12, 3, 1
%e 3, 9, 18, 12, 15, 3, 1;
%e ...
%Y Cf. A046854, A111314, A131240.
%K nonn,tabl
%O 0,2
%A _Gary W. Adamson_, Jun 21 2007
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