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A003575 Dowling numbers. 0
1, 2, 7, 35, 214, 1523, 12349, 112052, 1120849, 12219767, 143942992, 1819256321, 24526654381, 350974470746, 5308470041299, 84554039118383, 1413794176669942, 24745966692370607, 452277149756692105 (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 + 1/3 exp(3 z) - 1/3).

CROSSREFS

Sequence in context: A086637 A172511 A130458 * A043546 A201690 A080831

Adjacent sequences:  A003572 A003573 A003574 * A003576 A003577 A003578

KEYWORD

nonn

AUTHOR

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

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Last modified February 17 05:54 EST 2012. Contains 205985 sequences.