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Search: id:A133799
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A133799 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.


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