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1, 3, 12, 58, 327, 2109, 15366, 125316, 1135329, 11348623, 124359336, 1484796894, 19204214363, 267627706257, 3998828758938, 63777662250440, 1081442839245381, 19426122224995107, 368492543629967292
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,2
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REFERENCES
| L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 262 (#14).
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FORMULA
| G.f.: (1-1/Sum (k! x^k ))^3.
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CROSSREFS
| Sequence in context: A184511 A125276 A001426 * A020075 A020030 A121393
Adjacent sequences: A059437 A059438 A059439 * A059441 A059442 A059443
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Feb 01 2001
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EXTENSIONS
| More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Mar 04 2001
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