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%I #4 Feb 20 2022 01:40:22

%S 1,1,1,3,0,1,3,2,0,1,6,0,1,0,1,4,3,1,1,0,1,10,0,0,0,1,0,1,6,4,1,1,0,1,

%T 0,1,12,0,2,0,0,0,1,0,1,8,6,0,1,1,0,0,1,0,1

%N A129686 * A054523.

%C Row sums = A004277, 1 followed by even terms: (1, 2, 4, 6, 8, 10, ...).

%F A129686 * A054523 as infinite lower triangular matrices, where A129686 = the alternate term operator.

%e First few rows of the triangle:

%e 1;

%e 1, 1;

%e 3, 0, 1;

%e 3, 2, 0, 1;

%e 6, 0, 1, 0, 1;

%e 4, 3, 1, 1, 0, 1;

%e 10, 0, 0, 0, 1, 0, 1;

%e 6, 4, 1, 1, 0, 1, 0, 1;

%e ...

%Y Cf. A129686, A054523, A004277.

%K nonn,tabl

%O 1,4

%A _Gary W. Adamson_, May 02 2007