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A032320 Doubles (index 2+) under "EGJ" (unordered, element, labeled) transform. 0
2, 2, 12, 126, 1800, 33540, 757680, 20149290, 616940520, 21378058800, 827126546400, 35346832387020, 1653593623521840, 84055016334088800, 4613207941230688800, 271883701342581277950 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

CROSSREFS

Sequence in context: A032321 A013311 A087220 * A032227 A032069 A003090

Adjacent sequences:  A032317 A032318 A032319 * A032321 A032322 A032323

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified February 23 11:36 EST 2018. Contains 299579 sequences. (Running on oeis4.)