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A144883 Second column (m=2) of triangle A144881 (S1hat(3). 2
1, 3, 21, 96, 684, 4320, 35640, 293760, 2881440, 29695680, 345643200, 4296499200, 58518028800, 851751936000, 13338801100800, 222145265664000, 3934764739584000, 73675580977152000, 1455693852146688000, 30238671742304256000, 659012259039805440000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

FORMULA

a(n)=A144881(n+2,2), n>=0.

CROSSREFS

A001710 (first column). A144884 (third column).

Sequence in context: A108970 A069017 A264246 * A074597 A350726 A241795

Adjacent sequences: A144880 A144881 A144882 * A144884 A144885 A144886

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang Oct 09 2008

STATUS

approved

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Last modified February 8 15:16 EST 2023. Contains 360149 sequences. (Running on oeis4.)