A131777 5*A065941 - 4*A049310.

1, 5, 1, 1, 5, 1, 5, -3, 10, 1, 1, 5, 3, 10, 1, 5, -7, 20, -1, 15, 1, 1, 5, 1, 20, 10, 15, 1, 5, -11, 30, -15, 50, 6, 20, 1, 1, 5, -5, 30, 15, 50, 22, 20, 1, 5, -15, 40, -45, 105, -9, 100, 18, 25, 1

Offset

1,2

Comments

Row sums = A022096(n-1).

Links

Table of n, a(n) for n=1..55.

Formula

5*A065941 - 4*A049310 as infinite lower triangular matrices.

Example

First few rows of the triangle are:
1;
5, 1
1, 5, 1;
5, -3, 10, 1;
1, 5, 3, 10, 1;
5, -7, 20, -1, 15, 1;
1, 5, 1, 20, 10, 15, 1;
...

Crossrefs

Cf. A131774, A131775, A131776, A065941, A049310, A022096.

Sequence in context: A378962 A010333 A378898 * A323388 A260877 A353305

Adjacent sequences: A131774 A131775 A131776 * A131778 A131779 A131780

Keyword

tabl,sign

Author

Gary W. Adamson, Jul 14 2007

Extensions

Corrected A-number in row sums reference R. J. Mathar, Jun 16 2009

Status

approved