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 A001579 a(n) = 3^n + 5^n + 6^n. 84
 3, 14, 70, 368, 2002, 11144, 63010, 360248, 2076802, 12050504, 70290850, 411802328, 2421454402, 14282991464, 84472462690, 500716911608, 2973740844802, 17689728038024, 105375041354530, 628434388600088 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..300 Henri W. Gould, The Girard-Waring power sum formulas for symmetric functions and Fibonacci sequences, The Fibonacci Quarterly, 37(2):135-140, 1999. Index entries for linear recurrences with constant coefficients, signature (14,-63,90). FORMULA From Mohammad K. Azarian, Dec 26 2008: (Start) G.f.: 1/(1-3*x) + 1/(1-5*x) + 1/(1-6*x). E.g.f.: e^(3*x) + e^(5*x) + e^(6*x). (End) MATHEMATICA Table[3^n + 5^n + 6^n, {n, 0, 20}] PROG (MAGMA) [3^n + 5^n + 6^n: n in [0..20]]; // Vincenzo Librandi, May 20 2011 (PARI) a(n)=3^n+5^n+6^n \\ Charles R Greathouse IV, Jun 10 2011 CROSSREFS Cf. A001550, A001576, A034513, A074501-A074580. Sequence in context: A261207 A161939 A270598 * A327871 A006772 A320421 Adjacent sequences:  A001576 A001577 A001578 * A001580 A001581 A001582 KEYWORD easy,nonn AUTHOR STATUS approved

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Last modified February 17 18:14 EST 2020. Contains 332005 sequences. (Running on oeis4.)