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A046707 n!*Sum( n^(2k)/(2k)!, k=0..n/2). 0
1, 6, 33, 472, 4745, 99216, 1456273, 39669120, 769528593, 25737068800, 622548099041, 24632715009024, 715109889035737, 32630102257170432, 1106618435304908625, 57151019891266256896, 2219208490411286184737, 127876294410780326952960 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

CROSSREFS

Sequence in context: A118094 A306182 A121376 * A183466 A112289 A283232

Adjacent sequences:  A046704 A046705 A046706 * A046708 A046709 A046710

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 20 23:38 EDT 2019. Contains 326155 sequences. (Running on oeis4.)