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A135230 A103451 * A000012(signed) * A007318. 1
1, 1, 1, 2, 1, 1, 1, 2, 2, 1, 2, 2, 4, 3, 1, 1, 3, 6, 7, 4, 1, 2, 3, 9, 13, 11, 5, 1, 1, 4, 12, 22, 24, 16, 6, 1, 2, 4, 16, 34, 46, 40, 22, 7, 1, 1, 5, 20, 50, 80, 86, 62, 29, 8, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

row sums = A135231

LINKS

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

FORMULA

A103451 * A000012(signed) * A007318, where A000012(signed) = (1; -1,1; 1,-1,1;...).

EXAMPLE

First few rows of the triangle are:

1;

1, 1;

2, 1, 1;

1, 2, 2, 1;

2, 2, 4, 3, 1;

1, 3, 6, 7, 4, 1;

2, 3, 9, 13, 11, 5, 1;

1, 4, 12, 22, 24, 16, 6, 1;

2, 4, 16, 34, 46, 40, 22, 7, 1;

...

CROSSREFS

Cf. A103451, A135231, A007318, A000012.

Sequence in context: A086995 A220492 A229873 * A117957 A145702 A145704

Adjacent sequences:  A135227 A135228 A135229 * A135231 A135232 A135233

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Nov 23 2007

STATUS

approved

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Last modified April 26 08:05 EDT 2019. Contains 322472 sequences. (Running on oeis4.)