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A144888 Second column (m=2) of triangle A144886 (S1hat(4)). 2
1, 4, 36, 200, 1720, 12480, 118560, 1081920, 11793600, 131443200, 1658764800, 21990528000, 319711795200, 4922394624000, 81508654080000, 1428114530304000, 26582538673152000, 521466739605504000, 10779099461222400000, 233753593186713600000, 5310546788872765440000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..20.

FORMULA

a(n)= A144886(n+2,2), n>=0.

CROSSREFS

A001715 (first column). A144889 (third column)

Sequence in context: A263420 A302946 A220436 * A291643 A054773 A074434

Adjacent sequences:  A144885 A144886 A144887 * A144889 A144890 A144891

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang Oct 09 2008

STATUS

approved

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Last modified February 22 23:44 EST 2020. Contains 332157 sequences. (Running on oeis4.)