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 A054107 T(n,n-3), array T as in A054106. 0
 1, 3, 8, 15, 27, 44, 67, 97, 135, 182, 239, 307, 387, 480, 587, 709, 847, 1002, 1175, 1367, 1579, 1812, 2067, 2345, 2647, 2974, 3327, 3707, 4115, 4552, 5019, 5517, 6047, 6610, 7207, 7839, 8507, 9212, 9955, 10737, 11559 (list; graph; refs; listen; history; text; internal format)
 OFFSET 3,2 LINKS Table of n, a(n) for n=3..43. Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1). FORMULA For n>5, a(n) = 1/6 * (n^3 - 6n^2 + 23n - 48). G.f.: x^3*(1-x+x^2)*(1+x^2-2*x^3+x^4)/(1-x)^4. [Colin Barker, Sep 09 2012] MATHEMATICA LinearRecurrence[{4, -6, 4, -1}, {1, 3, 8, 15, 27, 44, 67}, 50] (* Harvey P. Dale, Apr 24 2020 *) CROSSREFS Sequence in context: A047837 A047873 A036419 * A031125 A294423 A294426 Adjacent sequences: A054104 A054105 A054106 * A054108 A054109 A054110 KEYWORD nonn,easy AUTHOR Clark Kimberling STATUS approved

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Last modified September 25 12:47 EDT 2023. Contains 365644 sequences. (Running on oeis4.)