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A006173 Witt vector *2!.
(Formerly M0174)
9
2, 1, 4, 13, 44, 135, 472, 1492, 5324, 17405, 63944, 215096, 799416, 2752909, 10310384, 36443256, 137263244, 489166324, 1860249448, 6739795717, 25596173800, 93596253769, 357974884304, 1319325363658, 5056389932088 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
If c is the Witt transform of b then b(n) = Sum_{d|n} A074650(n/d, c(d)).
The Somos transform sends sequence {a(n)} to sequence with g.f. Product_{i=1..n} 1/(1-a(i)*x^i).
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 shifted left. - Wouter Meeussen, Aug 20 2002
Witt transform of A060165. - Sean A. Irvine, Jan 15 2017
CROSSREFS
Sequence in context: A088624 A309878 A066409 * A102055 A232376 A350739
KEYWORD
nonn
AUTHOR
EXTENSIONS
Edited by Christian G. Bower, Aug 20 2002
STATUS
approved

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Last modified June 12 23:30 EDT 2024. Contains 373362 sequences. (Running on oeis4.)