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A126962 Define an array by d(m, 0) = 1, d(m, 1) = m; d(m, k) = (m - k + 1) d(m+1, k-1) - (k-1) (m+1) d(m+2, k-2). Sequence gives d(1,n). 1
1, 1, -2, -12, 24, 420, -720, -30240, 40320, 3764880, -3628800, -728481600, 479001600, 203545742400, -87178291200, -77806624896000, 20922789888000, 39045031657632000, -6402373705728000, -24904933604014464000, 2432902008176640000, 19678195269815322240000, -1124000727777607680000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

V. van der Noort and N. J. A. Sloane, Paper in preparation, 2007.

LINKS

Table of n, a(n) for n=0..22.

CROSSREFS

A column of A105937.

Sequence in context: A176710 A141900 A211374 * A002207 A181814 A232248

Adjacent sequences:  A126959 A126960 A126961 * A126963 A126964 A126965

KEYWORD

sign

AUTHOR

Vincent v.d. Noort, Mar 21 2007

STATUS

approved

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Last modified May 20 21:27 EDT 2019. Contains 323426 sequences. (Running on oeis4.)