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A003993
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Sequence b_3 (n) arising from homology of partitions with even number of blocks.
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2
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2, 12, 46, 152, 474, 1444, 4358, 13104, 39346, 118076, 354270, 1062856, 3188618, 9565908, 28697782, 86093408, 258280290, 774840940, 2324522894, 6973568760, 20920706362, 62762119172, 188286357606
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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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.
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MAPLE
| A003993 := proc(n) option remember; if n = 1 then 2 else 3*A003993(n-1)+4*n-2; fi; end;
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CROSSREFS
| Cf. A003994.
Sequence in context: A188982 A061990 A006742 * A129018 A069946 A176684
Adjacent sequences: A003990 A003991 A003992 * A003994 A003995 A003996
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KEYWORD
| nonn
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AUTHOR
| Sheila Sundaram (sheila(AT)paris-gw.cs.miami.edu)
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