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 A243131 16*n^5 - 20*n^3 + 5*n. 2
 0, 1, 362, 3363, 15124, 47525, 120126, 262087, 514088, 930249, 1580050, 2550251, 3946812, 5896813, 8550374, 12082575, 16695376, 22619537, 30116538, 39480499, 51040100, 65160501, 82245262, 102738263, 127125624, 155937625, 189750626, 229188987 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Chebyshev polynomial of the first kind T(5,n). LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (6,-15,20,-15,6,-1). FORMULA a(n) = n*(16*n^4-20*n^2+5) = (-1/4)*n *(-8*n^2+5+sqrt(5))*(8*n^2-5+sqrt(5)). G.f.: x*(1 + 356*x + 1206*x^2 + 356*x^3 + x^4)/(1 - x)^6. MAPLE a:= n-> simplify(ChebyshevT(5, n)): seq(a(n), n=0..30);  # Alois P. Heinz, May 31 2014 MATHEMATICA Table[ChebyshevT[5, n], {n, 0, 40}] (* or *) Table[16*n^5 - 20*n^3 + 5*n, {n, 0, 20}] PROG (MAGMA) [16*n^5-20*n^3+5*n: n in [0..40]]; CROSSREFS Cf. A056220, A144129, A144130. Sequence in context: A045098 A158310 A031716 * A155019 A020539 A157442 Adjacent sequences:  A243128 A243129 A243130 * A243132 A243133 A243134 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, May 31 2014 STATUS approved

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Last modified September 23 21:27 EDT 2020. Contains 337315 sequences. (Running on oeis4.)