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A060917 E.g.f.: exp((-1)^k/k*LambertW(-x)^k)/(k-1)!, k=3. 2
1, 12, 150, 2180, 36855, 715008, 15697948, 385300800, 10463945085, 311697869120, 10108450408914, 354630018043392, 13384651003544275, 540860323696035840, 23300648262667635960, 1066165291831917811712 (list; graph; refs; listen; history; internal format)
OFFSET

3,2

FORMULA

a(n)=(n-1)!/(k-1)!*Sum_{i=0..floor((n-k)/k)} 1/(i!*k^i)*n^(n-(i+1)*k)/(n-(i+1)*k)!, k=3.

CROSSREFS

Cf. A057817, A060918.

Sequence in context: A056345 A068768 A053507 * A113358 A015611 A127650

Adjacent sequences:  A060914 A060915 A060916 * A060918 A060919 A060920

KEYWORD

easy,nonn

AUTHOR

Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 10 2001

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Last modified February 14 18:33 EST 2012. Contains 205663 sequences.