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A132814 A007318^(-1) * A132813. 2
1, 0, 2, 0, 2, 3, 0, 0, 9, 4, 0, 0, 6, 24, 5, 0, 0, 0, 40, 50, 6, 0, 0, 0, 20, 150, 90, 7, 0, 0, 0, 0, 175, 420, 147, 8, 0, 0, 0, 0, 70, 840, 980, 224, 9, 0, 0, 0, 0, 0, 756, 2940, 2016, 324, 10, 0, 0, 0, 0, 0, 252, 4410, 8400, 3780, 450, 11 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Row sums = A005773 starting (1, 2, 5, 13, 35, 96,...).

LINKS

Table of n, a(n) for n=0..65.

FORMULA

Inverse binomial transform of A132813.

EXAMPLE

First few rows of the triangle are:

1;

0, 2;

0, 2, 3;

0, 0, 9, 4;

0, 0, 6, 24, 5;

0, 0, 0, 40, 50, 6;

0, 0, 0, 20, 150, 90, 7;

...

PROG

(PARI) tabl(nn) = {t007318 = matrix(nn, nn, n, k, binomial(n-1, k-1)); t132813 = matrix(nn, nn, n, k, binomial(n-1, k-1)*binomial(n, k-1)); t132814 = t007318^(-1)*t132813; for (n=1, nn, for (k=1, n, print1(t132814[n, k], ", "); ); ); } \\ Michel Marcus, Feb 12 2014

CROSSREFS

Cf. A132813, A005773.

Sequence in context: A128064 A144217 A187881 * A058623 A209689 A204329

Adjacent sequences:  A132811 A132812 A132813 * A132815 A132816 A132817

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Sep 01 2007

EXTENSIONS

More terms from Michel Marcus, Feb 12 2014

STATUS

approved

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Last modified October 22 21:09 EDT 2018. Contains 316505 sequences. (Running on oeis4.)