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A136579 Triangle read by rows: A128174 * A136572. 3
1, 0, 1, 1, 0, 2, 0, 1, 0, 6, 1, 0, 2, 0, 24, 0, 1, 0, 6, 0, 120, 1, 0, 2, 0, 24, 0, 720, 0, 1, 0, 6, 0, 120, 0, 5040, 1, 0, 2, 0, 24, 0, 720, 0, 40320 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

Row sums = A136580: 1, 1, 3, 7, 27, 127,...

LINKS

Table of n, a(n) for n=0..44.

FORMULA

A128174 * A136572 Triangle, even rows = even n! interspersed with zeros. Odd n rows, = odd n! interspersed with zeros.

EXAMPLE

First few rows of the triangle are:

1;

0, 1;

1, 0, 2;

0, 1, 0, 6;

1, 0, 2, 0, 24;

0, 1, 0, 6, 0, 120;

1, 0, 2, 0, 24, 0, 720;

...

CROSSREFS

Cf. A136580, A128174, A136572, A000142.

Sequence in context: A112227 A166378 A249820 * A249731 A249732 A076694

Adjacent sequences:  A136576 A136577 A136578 * A136580 A136581 A136582

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jan 09 2008

STATUS

approved

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Last modified September 21 00:17 EDT 2019. Contains 327252 sequences. (Running on oeis4.)