A003994 - OEIS

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A003994

Sequence b_4 (n) arising from homology of partitions with even number of blocks.

6, 138, 1452, 11444, 78642, 502846, 3089624, 18559208, 110049502, 647720562, 3796113284, 22194147996, 129581349642 (list; graph; refs; listen; history; internal format)

	OFFSET	`3,1`
	REFERENCES	`S. Sundaram, The homology of partitions with an even number of blocks, J. Alg. Comb., 4 (1995), 69-92.` `S. Sundaram, Plethysm, partitions with an even number of blocks and Euler numbers, DIMACS Series, Vol. 24 (1996), 171-198, Amer. Math. Soc.`
	MAPLE	`f := proc(n) option remember; if n = 1 then 2 else 3f(n-1)+4n-2; fi; end;`
	CROSSREFS	`Cf. A003993.` `Sequence in context: A196946 A090407 A075185 * A155558 A053467 A090944` `Adjacent sequences: A003991 A003992 A003993 * A003995 A003996 A003997`
	KEYWORD	`nonn`
	AUTHOR	`Sheila Sundaram (sheila(AT)paris-gw.cs.miami.edu)`

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Last modified February 17 14:50 EST 2012. Contains 206050 sequences.