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 A215109 a(n) = A215082(2*n+1). 0
 1, 3, 5, 12, 23, 43, 81, 148, 266, 476, 842, 1478, 2581, 4481, 7743, 13328, 22857, 39073, 66605, 113242, 192084, 325128, 549252, 926220, 1559353, 2621295, 4400249, 7376868, 12352043, 20659159, 34516377 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Table of n, a(n) for n=0..30. Index entries for linear recurrences with constant coefficients, signature (1,2,1,-2,-3,-1). FORMULA a(n) = a(n-1) + 2*a(n-2) + a(n-3) - 2*a(n-4) - 3*a(n-5) - a(n-6), a(0) = 1, a(1) = 3, a(2) = 5, a(3) = 12, a(4) = 23, a(5) = 43. G.f.: (2*x+1)/((x^2+x+1)*((x^2+x-1)^2). CROSSREFS Cf. A000045, A023607, A215082, A215108. Sequence in context: A161624 A247794 A034758 * A131322 A224747 A036657 Adjacent sequences: A215106 A215107 A215108 * A215110 A215111 A215112 KEYWORD nonn,easy AUTHOR Philippe Deléham, Aug 03 2012 STATUS approved

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Last modified June 16 16:46 EDT 2024. Contains 373432 sequences. (Running on oeis4.)