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A156132 Q_n(4) (see A104035). 1
1, 4, 33, 404, 6597, 134644, 3297693, 94228004, 3077100777, 113046200164, 4614532495353, 207201136625204, 10149511013598957, 538592387976486484, 30779388439090380213, 1884616483302733144004, 123087714448128536653137, 8541524061361098605073604 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

FORMULA

G.f.: 1/Q(0), where Q(k) = 1 - 4*x*(2*k+1) - 17*x^2*(k+1)^2/Q(k+1); (continued fraction). - Sergei N. Gladkovskii, Sep 28 2013

CROSSREFS

Sequence in context: A293193 A295256 A269926 * A215364 A213641 A111534

Adjacent sequences:  A156129 A156130 A156131 * A156133 A156134 A156135

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 06 2009

STATUS

approved

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Last modified February 23 18:13 EST 2019. Contains 320437 sequences. (Running on oeis4.)