1,6

Row sums = A156834: (1, 2, 3, 5, 5, 12, 7, 17, 19, 30, 11,...).

Triangle read by rows, A156348 * A130207, where A130207 = an infinite lower

triangular matrix with A000010 as the main diagonal and the rest zeros.

First few rows of the triangle =

1;

1, 1;

1, 0, 2;

1, 2, 0, 2;

1, 0, 0, 0, 4;

1, 3, 6, 0, 0, 2;

1, 0, 0, 0, 0, 0, 6;

1, 4, 0, 8, 0, 0, 0, 4;

1, 0, 12, 0, 0, 0, 0, 0, 6;

1, 5, 0, 0, 20, 0, 0, 0, 0, 4;

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10;

1, 6, 20, 20, 0, 12, 0, 0, 0, 0, 0, 4;

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12;

1, 7, 0, 0, 0, 0, 42, 0, 0, 0, 0, 0, 0, 6;

...

Cf. A156348, A130207, A156834, A000010

Sequence in context: A117169 A046920 A107599 this_sequence A079483 A071460 A033794

Adjacent sequences: A156833 A156834 A156835 this_sequence A156837 A156838 A156839

nonn,tabl

Gary W. Adamson & Mats Granvik (qntmpkt(AT)yahoo.com), Feb 16 2009