A131331 - OEIS

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A131331

A046854 * A000012(signed).

1, 0, 1, 1, 0, 1, -1, 2, 0, 1, 2, -1, 3, 0, 1, -3, 4, -1, 4, 0, 1, 5, -4, 7, -1, 5, 0, 1, -8, 9, -5, 11, -1, 6, 0, 1, 13, -12, 16, -6, 16, -1, 7, 0, 1, -21, 22, -17, 27, -7, 22, -1, 8, 0, 1

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

0,8

COMMENTS

Row sums = A094967: (1, 1, 2, 2, 5, 5, 13, 13, 34, 34...).

LINKS

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

FORMULA

A046854 * A000012(signed by columns, + - + -...).

EXAMPLE

First few rows of the triangle are:

0, 1;

1, 0, 1;

-1, 2, 0, 1;

2, -1, 3, 0, 1;

-3, 4, -1, 4, 0, 1;

5, -4, 7, -1, 5, 0, 1;

-8, 9, -5, 11, -1, 6, 0, 1;

...

CROSSREFS

Cf. A046854, A000012, A094967.

Sequence in context: A025835 A029277 A077905 * A268696 A020513 A029276

Adjacent sequences: A131328 A131329 A131330 * A131332 A131333 A131334

KEYWORD

tabl,sign

AUTHOR

Gary W. Adamson, Jun 29 2007

STATUS

approved