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A006177
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Witt vector *2!/2!.
(Formerly M2750)
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2
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1, 1, 3, 8, 25, 72, 245, 772, 2692, 8925, 32065, 109890, 400023, 1402723, 5165327, 18484746, 68635477, 248339122, 930138521, 3406231198, 12810761323, 47306348881, 178987624513, 665627041157, 2528210175630, 9456885664122
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| The Somos transform sends sequence {a(n)} to sequence with g.f. Product (1/(1-a[i]*x^i)) i=1 to n.
If c is the Witt transform of b then b(n) = Sum ( A074650(n/d, c(d)) ), d|n
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REFERENCES
| H. Gaudier, Relevement des coefficients binomiaux dans les vecteurs de Witt, S\'{e}minaire Lotharingien de Combinatoire. Institut de Recherche Math. Avanc\'{e}e, Universit\'{e} Louis Pasteur, Strasbourg, Actes 16 (1988), 358/S-18, pp. 93-108.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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FORMULA
| Inverse Somos transform of A000108. (Wouter Meeussen, Aug 20 2002)
Witt transform of A022553.
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CROSSREFS
| Cf. A006173, A006973.
Sequence in context: A203413 A141799 A093969 * A148788 A022553 A148789
Adjacent sequences: A006174 A006175 A006176 * A006178 A006179 A006180
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KEYWORD
| nonn
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AUTHOR
| Simon Plouffe (simon.plouffe(AT)gmail.com)
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EXTENSIONS
| Edited by Christian G. Bower (bowerc(AT)usa.net), Aug 20 2002, Aug 28 2002
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