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 A121892 Row sums of triangle in A066094. 0
 1, 2, 4, 24, 192, 1920, 23040, 322560, 5160960, 92897280, 1857945600, 40874803200, 980995276800 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS FORMULA a(0)=1, a(1)=2, a(n)=A000165(n)/2 for n>1. a(n)=A032107(n), n>0. - R. J. Mathar, Jun 05 2008 G.f.: 1 + x + x/Q(0), where Q(k) = 1 - 4*x*(2*k+1) - 4*x^2*(2*k+1)*(2*k+2)/( 1 - 4*x*(2*k+2) - 4*x^2*(2*k+2)*(2*k+3)/Q(k+1) ) ; (continued fraction). - Sergei N. Gladkovskii, Sep 23 2013 CROSSREFS Sequence in context: A012292 A211934 A012592 * A032107 A141307 A190655 Adjacent sequences:  A121889 A121890 A121891 * A121893 A121894 A121895 KEYWORD nonn AUTHOR Philippe Deléham, Sep 01 2006 STATUS approved

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Last modified September 22 07:34 EDT 2020. Contains 337289 sequences. (Running on oeis4.)