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 A156550 a(n) = 5*(-1)^n*A078008(n). 0
 5, 0, 10, -10, 30, -50, 110, -210, 430, -850, 1710, -3410, 6830, -13650, 27310, -54610, 109230, -218450, 436910, -873810, 1747630, -3495250, 6990510, -13981010, 27962030, -55924050, 111848110, -223696210, 447392430, -894784850, 1789569710, -3579139410 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Index entries for linear recurrences with constant coefficients, signature (-1,2). FORMULA a(n) = A140966(n)+A140966(n+2). a(n) = 3*A140966(n)-A140966(n+1). a(n+1) = 10*(-1)^n*A001045(n). G.f.: 5*(1+x)/(1+x-2*x^2). - R. J. Mathar, Feb 23 2009 a(n) = (5*(2+(-2)^n))/3. - Colin Barker, Jun 10 2012 a(n) = -a(n-1) + 2*a(n-2) for n > 1. - Klaus Purath, Jan 30 2021 E.g.f.: 5*exp(-2*x)*(1 + 2*exp(3*x))/3. - Stefano Spezia, Jan 30 2021 MATHEMATICA LinearRecurrence[{-1, 2}, {5, 0}, 32] (* Robert P. P. McKone, Jan 31 2021 *) CROSSREFS Cf. A001045, A078008, A140966. Sequence in context: A010481 A291724 A340950 * A088307 A208477 A007392 Adjacent sequences:  A156547 A156548 A156549 * A156551 A156552 A156553 KEYWORD sign,easy,less AUTHOR Paul Curtz, Feb 09 2009 EXTENSIONS Edited and extended by R. J. Mathar Feb 23 2009 STATUS approved

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Last modified May 6 23:10 EDT 2021. Contains 343599 sequences. (Running on oeis4.)