A131373 A046854 + A065941 - A000012.

1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 2, 5, 2, 1, 1, 3, 6, 6, 3, 1, 1, 3, 10, 7, 10, 3, 1, 1, 4, 11, 14, 14, 11, 4, 1, 1, 4, 16, 15, 29, 15, 16, 4, 1, 1, 5, 17, 26, 35, 35, 26, 17, 5, 1

Offset

0,8

Comments

Row sums = A131269: (1, 2, 3, 6, 11, 20, 35, 60,...).

Links

Table of n, a(n) for n=0..54.

Formula

A046854 + A065941 - A000012 as infinite lower triangular matrices.

Example

First few rows of the triangle are:
1;
1, 1;
1, 1, 1;
1, 2, 2, 1;
1, 2, 5, 2, 1;
1, 3, 6, 6, 3, 1;
1, 3, 10, 7, 10, 3, 1;
1, 4, 11, 14, 14, 11, 4, 1;
1, 4, 16, 15, 29, 15, 16, 4, 1;
...

Crossrefs

Cf. A056854, A065941, A000012, A131269.

Sequence in context: A101489 A104156 A070166 * A245185 A034853 A242093

Adjacent sequences: A131370 A131371 A131372 * A131374 A131375 A131376

Keyword

nonn,tabl

Author

Gary W. Adamson, Jul 03 2007

Status

approved