A212348 - OEIS

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A212348

Sequence of coefficients of x in marked mesh pattern generating function Q_{n,132}^(-,0,2,0)(x).

2, 9, 34, 115, 376, 1219, 3980, 13174, 44310, 151401, 524796, 1842099, 6536322, 23408595, 84502188, 307143018, 1123073412, 4128140061, 15244685730, 56530488699, 210408873234, 785790337296, 2943588032022, 11057564567625, 41644080691598, 157206310465485

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OFFSET

3,1

LINKS

Table of n, a(n) for n=3..28.

S. Kitaev, J. Remmel and M. Tiefenbruck, Marked mesh patterns in 132-avoiding permutations I, arXiv preprint arXiv:1201.6243, 2012

MATHEMATICA

CCC[t]=(1-(1-4*t)^(1/2))/(2*t); NQ2[t, x]=1/(1 - t*x*CCC[t] - t(1 - x)*(1 + t)); CoefficientList[Coefficient[Simplify[Series[NQ2[t, x], {t, 0, 35}]], x], t] (* Robert Price, Jun 05 2012 *)

CROSSREFS

Sequence in context: A334443 A301868 A288958 * A000524 A289614 A120989

Adjacent sequences: A212345 A212346 A212347 * A212349 A212350 A212351

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 09 2012

EXTENSIONS

a(10)-a(35) from Robert Price, Jun 05 2012

STATUS

approved