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A074563
a(n) = 4^n + 5^n + 8^n.
1
3, 17, 105, 701, 4977, 36917, 281865, 2191661, 17233377, 136432997, 1084556025, 8642957021, 68980394577, 551043625877, 4404418462185, 35215963408781, 281631859568577, 2252579933007557, 18018281926224345, 144134536440090941
OFFSET
0,1
FORMULA
From Mohammad K. Azarian, Dec 30 2008: (Start)
G.f.: 1/(1-4*x) + 1/(1-5*x) + 1/(1-8*x).
E.g.f.: exp(4*x) + exp(5*x) + exp(8*x). (End)
MATHEMATICA
Table[4^n + 5^n + 8^n, {n, 0, 20}]
PROG
(Magma) [4^n + 5^n + 8^n: n in [0..20]]; // Vincenzo Librandi, Aug 25 2011
(PARI) vector(20, n, n--; 4^n + 5^n + 8^n) \\ G. C. Greubel, Nov 09 2018
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Robert G. Wilson v, Aug 23 2002
STATUS
approved