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A052482 2^(n-2)*binomial(n+1,2). 1
3, 12, 40, 120, 336, 896, 2304, 5760, 14080, 33792, 79872, 186368, 430080, 983040, 2228224, 5013504, 11206656, 24903680, 55050240, 121110528, 265289728, 578813952, 1258291200, 2726297600, 5888802816, 12683575296, 27246198784 (list; graph; refs; listen; history; internal format)
OFFSET

2,1

CROSSREFS

Essentially the same as A080929.

Sequence in context: A032093 A007993 * A080929 A061136 A027991 A120304

Adjacent sequences:  A052479 A052480 A052481 * A052483 A052484 A052485

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Mar 16 2000

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Last modified February 17 16:49 EST 2012. Contains 206058 sequences.