id:A133799 - OEIS Search Results

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a(2) = 1; for n >= 3, a(n) = (n-2)!*Stirling_2(n,n-1)/2.

+0
2

1, 3, 6, 30, 180, 1260, 10080, 90720, 907200, 9979200, 119750400, 1556755200, 21794572800, 326918592000, 5230697472000, 88921857024000, 1600593426432000, 30411275102208000, 608225502044160000, 12772735542927360000, 281000181944401920000 (list; graph; listen)

	OFFSET	`2,2`
	CROSSREFS	`A diagonal of triangle A133800.` `Sequence in context: A136946 A125521 A090932 this_sequence A088436 A088506 A061137` `Adjacent sequences: A133796 A133797 A133798 this_sequence A133800 A133801 A133802`
	KEYWORD	`nonn`
	AUTHOR	`njas, Jan 17 2008`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

AT&T Labs Research