A131228 3*A051340 - 2*A128174.

1, 3, 4, 1, 3, 7, 3, 1, 3, 10, 1, 3, 1, 3, 13, 3, 1, 3, 1, 3, 16, 1, 3, 1, 3, 1, 3, 19, 3, 1, 3, 1, 3, 1, 3, 22, 1, 3, 1, 3, 1, 3, 25, 3, 1, 3, 1, 3, 1, 3, 1, 3, 28

Offset

0,2

Comments

Row sums = A131229.

Links

Table of n, a(n) for n=0..52.

Formula

3*A051340 - 2*A128174 as infinite lower triangular matrices.

Example

First few rows of the triangle are:
1;
3, 4;
1, 3, 7;
3, 1, 3, 10;
1, 3, 1, 3, 13;
...

Crossrefs

Cf. A051340, A128174, A131229, A131227.

Sequence in context: A128529 A205547 A169782 * A238558 A131129 A087694

Adjacent sequences: A131225 A131226 A131227 * A131229 A131230 A131231

Keyword

nonn

Author

Gary W. Adamson, Jun 20 2007

Status

approved