A157030 Triangle read by rows, A156834 * A054521

1, 2, 0, 2, 1, 0, 4, 0, 1, 0, 2, 1, 1, 1, 0, 8, 3, 0, 0, 1, 0, 2, 1, 1, 1, 1, 1, 0, 10, 0, 5, 0, 1, 0, 1, 0, 8, 7, 0, 1, 1, 0, 1, 1, 0, 12, 5, 6, 5, 0, 0, 10, 1, 0, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 34, 10, 10, 0, 7, 0, 10, 0, 0, 1, 0

Offset

1,2

Comments

Left border = A157019: (1, 2, 2, 4, 2, 8, 2, 10,...).

Links

Table of n, a(n) for n=1..76.

Formula

Triangle read by rows, A156834 * A054521; as infinite lower triangular matrices.

Example

First few rows of the triangle =
1;
2, 0;
2, 1, 0;
4, 0, 1, 0;
2, 1, 1, 1, 0;
8, 3, 0, 0, 1, 0;
2, 1, 1, 1, 1, 1, 0;
10, 0, 5, 0, 1, 0, 1, 0;
8, 7, 0, 1, 1, 0, 1, 1, 0;
12, 5, 6, 5, 0, 0, 10, 1, 0;
2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0;
34, 10, 10, 0, 7, 0, 1, 0, 0, 0, 1, 0;
2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0;
...

Crossrefs

Cf. A156834 (row sums), A054521.

Sequence in context: A074905 A058548 A372876 * A080844 A321428 A362615

Adjacent sequences: A157027 A157028 A157029 * A157031 A157032 A157033

Keyword

nonn,tabl,more

Author

Gary W. Adamson and Mats Granvik, Feb 21 2009

Status

approved