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A131777 5*A065941 - 4*A049310. 5
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 (list; table; graph; refs; listen; history; text; internal format)
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: A071170 A108691 A010333 * A260877 A237888 A286462

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

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Last modified February 19 20:48 EST 2018. Contains 299357 sequences. (Running on oeis4.)