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A006177 Witt vector *2!/2!.
(Formerly M2750)
3
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; text; internal format)
OFFSET
1,3
COMMENTS
The Somos transform sends sequence {a(n)} to sequence with g.f. Product_{i=1..n} 1/(1-a(i)*x^i).
If c is the Witt transform of b then b(n) = Sum_{d|n} A074650(n/d, c(d)).
REFERENCES
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
H. Gaudier, Relèvement des coefficients binomiaux dans les vecteurs de Witt, Séminaire Lotharingien de Combinatoire. Institut de Recherche Math. Avancée, Université Louis Pasteur, Strasbourg, Actes 16 (1988), 358/S-18, pp. 93-108.
H. Gaudier, Relèvement des coefficients binomiaux dans les vecteurs de Witt, Séminaire Lotharingien de Combinatoire. Institut de Recherche Math. Avancée, Université Louis Pasteur, Strasbourg, Actes 16 (1988), 358/S-18, pp. 93-107. (Annotated scanned copy)
FORMULA
Inverse Somos transform of A000108. - Wouter Meeussen, Aug 20 2002
Witt transform of A022553.
CROSSREFS
Sequence in context: A259699 A259700 A213439 * A148788 A292778 A022553
KEYWORD
nonn
AUTHOR
EXTENSIONS
Edited by Christian G. Bower, Aug 20 2002, Aug 28 2002
STATUS
approved

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Last modified March 19 02:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)