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A052752
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a(n) = (3*n+1)^(n-1). E.g.f.: exp(-1/3*LambertW(-3*x)).
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0
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1, 1, 7, 100, 2197, 65536, 2476099, 113379904, 6103515625, 377801998336, 26439622160671, 2064377754059776, 177917621779460413, 16777216000000000000, 1718264124282290785243, 189937030341242876870656
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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LINKS
| INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 708
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MAPLE
| spec := [S, {B=Prod(S, S, S, Z), S=Set(B)}, labeled]: seq(combstruct[count](spec, size=n), n=0..20);
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CROSSREFS
| Sequence in context: A115066 A123616 A001594 * A165878 A175345 A142358
Adjacent sequences: A052749 A052750 A052751 * A052753 A052754 A052755
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KEYWORD
| easy,nonn
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AUTHOR
| encyclopedia(AT)pommard.inria.fr, Jan 25 2000
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EXTENSIONS
| Better description from Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 02 2003
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