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A003578 Dowling numbers. 0
1, 2, 10, 80, 772, 8648, 111592, 1631360, 26518672, 472528160, 9139219360, 190461416192, 4250569655872, 101040920561792, 2546488866632320, 67772341398044672, 1898177372174512384, 55780954727160472064 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

REFERENCES

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

FORMULA

E.g.f.: exp(z + 1/6 exp(6 z) - 1/6).

CROSSREFS

Sequence in context: A100248 A108486 A152168 * A152600 A048286 A133480

Adjacent sequences:  A003575 A003576 A003577 * A003579 A003580 A003581

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 14 18:47 EST 2012. Contains 205663 sequences.