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 A140420 Binomial transform of 0, 1, 1, 7, 7, 31, 31, ..., zero followed by duplicated A083420. 2
 0, 1, 3, 13, 45, 151, 483, 1513, 4665, 14251, 43263, 130813, 394485, 1187551, 3570843, 10728913, 32219505, 96724051, 290303223, 871171813, 2614039725, 7843167751, 23531600403, 70598995513, 211805375145, 635432902651 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Index entries for linear recurrences with constant coefficients, signature (5, -5, -5, 6). FORMULA a(n+1)-3a(n) = A099430(n). O.g.f.: (3x^2-2x+1)x/((2x-1)(1+x)(3x-1)(1-x)). - R. J. Mathar, Jul 10 2008 a(n)+a(n+1)=A126644(n). - R. J. Mathar, Jul 10 2008 CROSSREFS Sequence in context: A141088 A187915 A115128 * A308087 A232231 A121136 Adjacent sequences:  A140417 A140418 A140419 * A140421 A140422 A140423 KEYWORD nonn AUTHOR Paul Curtz, Jun 18 2008, corrected Jun 23 2008 EXTENSIONS More terms from R. J. Mathar, Jul 10 2008 STATUS approved

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Last modified August 18 04:50 EDT 2019. Contains 326072 sequences. (Running on oeis4.)