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A003576 Dowling numbers. 0
1, 2, 8, 48, 352, 3008, 29440, 324096, 3947520, 52541440, 757260288, 11733385216, 194272854016, 3419584921600, 63707979972608, 1251489089060864, 25836869372608512, 558946705406427136 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

Benoumhani, Moussa; On Whitney numbers of Dowling lattices. Discrete Math. 159 (1996), no. 1-3, 13-33.

LINKS

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

FORMULA

E.g.f.: exp(z + 1/4*exp(4*z) - 1/4).

G.f.: 1/Q(0), where Q(k) = 1 - 2*x*(2*k+1) -  2*x^2*(2*k+2)/Q(k+1) ; (continued fraction). - Sergei N. Gladkovskii, Sep 26 2013

CROSSREFS

Sequence in context: A136722 A085615 A054726 * A225042 A095989 A177388

Adjacent sequences:  A003573 A003574 A003575 * A003577 A003578 A003579

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 22 09:57 EDT 2018. Contains 316433 sequences. (Running on oeis4.)