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A132465 Let df(n,k) = Product_{i=0..k-1} (n-i) be the descending factorial and let P(m,n) = df(n-1,m-1)^2*(2*n-m)/((m-1)!*m!). Sequence gives P(7,n). 1
0, 0, 0, 0, 0, 0, 1, 63, 1232, 13104, 94500, 518364, 2317392, 8833968, 29630601, 89464375, 247351104, 634542272, 1526183568, 3470399856, 7511688000, 15564217536, 31016698713, 59686024167, 111284511184, 201628350000, 355896440900, 613353440700, 1034083486800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

Table of n, a(n) for n=1..29.

CROSSREFS

See A132458 for further information.

Sequence in context: A258014 A183076 A230660 * A202983 A107319 A243214

Adjacent sequences:  A132462 A132463 A132464 * A132466 A132467 A132468

KEYWORD

nonn

AUTHOR

Ottavio D'Antona (dantona(AT)dico.unimi.it), Oct 31 2007

STATUS

approved

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Last modified August 4 19:54 EDT 2020. Contains 336202 sequences. (Running on oeis4.)