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A147618 The 3rd Witt transform of A000217. 1
0, 0, 0, 0, 3, 15, 54, 165, 429, 999, 2145, 4290, 8100, 14586, 25194, 41985, 67830, 106590, 163431, 245157, 360525, 520749, 740025, 1036035, 1430703, 1950975, 2629575, 3506085, 4628052, 6052068, 7845255, 10086780, 12869340, 16301142 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

The 2nd Witt transform of A000217 is essentially in A032092.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Pieter Moree, The formal series Witt transform, Discr. Math. no. 295 vol. 1-3 (2005) 143-160.

FORMULA

G.f.: 3x^4(x^4-x^3+3x^2-x+1)/((1-x)^9*(1+x+x^2)^3).

MATHEMATICA

CoefficientList[Series[3*x^4(x^4 - x^3 + 3*x^2 - x + 1)/((1 - x)^9 * (1 + x + x^2)^3), {x, 0, 40}], x] (* Vincenzo Librandi, Dec 13 2012 *)

CROSSREFS

Sequence in context: A038192 A212869 A298178 * A290764 A286986 A261565

Adjacent sequences:  A147615 A147616 A147617 * A147619 A147620 A147621

KEYWORD

easy,nonn

AUTHOR

R. J. Mathar, Nov 08 2008

STATUS

approved

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Last modified May 19 08:25 EDT 2019. Contains 323389 sequences. (Running on oeis4.)