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 A097953 Boustrophedon transform of ((-2)^n+0^n)/2. 0
 1, 0, 1, 1, 1, 15, 11, 201, 561, 4575, 25171, 187801, 1400521, 11694735, 103903931, 993285801, 10113814881, 109470594495, 1254389104291, 15173016742201, 193187969483641, 2582736821247855, 36172850924874251 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 COMMENTS Inverse binomial transform of A062272. LINKS FORMULA E.g.f.: (1+exp(-2x))(sec(x)+tan(x))/2. a(n) ~ n! * (1+exp(-Pi)) * (2/Pi)^(n+1). - Vaclav Kotesovec, Sep 29 2013 MATHEMATICA CoefficientList[Series[(1+1/E^(2*x))*(1+Sin[x])/Cos[x]/2, {x, 0, 20}], x]* Range[0, 20]! (* Vaclav Kotesovec, Sep 29 2013 *) CROSSREFS Cf. A000734. Sequence in context: A013430 A131082 A296818 * A200522 A273445 A195533 Adjacent sequences:  A097950 A097951 A097952 * A097954 A097955 A097956 KEYWORD nonn AUTHOR Paul Barry, Jan 21 2005 STATUS approved

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Last modified January 22 07:39 EST 2020. Contains 331139 sequences. (Running on oeis4.)