A006439 - OEIS

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A006439

Number of tree-rooted toroidal maps.
(Formerly M3719)

4, 152, 2630, 31500, 303534, 2530976, 19030428, 132386340, 866782510, 5405853200 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	REFERENCES	`N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).` `Walsh, T. R. S.; Lehman, A. B.; Counting rooted maps by genus. III: Nonseparable maps. J. Combinatorial Theory Ser. B 18 (1975), 222-259.`
	CROSSREFS	`Sequence in context: A159197 A180375 A160470 * A158104 A197204 A197802` `Adjacent sequences: A006436 A006437 A006438 * A006440 A006441 A006442`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 15 09:15 EST 2012. Contains 205753 sequences.