A131255 - OEIS

%I #4 Feb 18 2022 22:43:33

%S 1,0,1,0,1,1,1,0,2,1,0,1,1,3,1,0,1,1,3,4,1,1,0,2,2,6,5,1,0,1,1,3,5,10,

%T 6,1,0,1,1,3,5,11,15,7,1,1,0,2,2,6,10,21,21,8,1

%N A004070 * A000012(signed).

%C Row sums = A004695 starting (1, 1, 2, 4, 6, 10, 17, 27, 44, 72, ...). A058393 = A000012(signed) * A004070.

%F A004070 * A000012, where A000012 = (1; -1,1; 1,-1,1; ...).

%e First few rows of the triangle:

%e   1;

%e   0,  1;

%e   0,  1,  1;

%e   1,  0,  2,  1;

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

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

%e   1,  0,  2,  2,  6,  5,  1;

%e   0,  1,  1,  3,  5, 10,  6,  1;

%e   0,  1,  1,  3,  5, 11, 15,  7,  1;

%e   1,  0,  2,  2,  6, 10,  2, 21,  8,  1;

%e   ...

%Y Cf. A004070, A000012, A004695, A058393.

%K nonn,tabl

%O 0,9

%A _Gary W. Adamson_, Jun 23 2007