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A074550
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3^n + 4^n + 8^n.
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1
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3, 15, 89, 603, 4433, 34035, 266969, 2115723, 16849313, 134499555, 1074849449, 8594306043, 68736785393, 549824517075, 4398319729529, 35185460179563, 281479314724673, 2251817122694595, 18014467616379209, 144115464116024283
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..200
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FORMULA
| G.f.: 1/(1-3*x)+1/(1-4*x)+1/(1-8*x). E.g.f.: exp(3*x)+exp(4*x)+exp(8*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Dec 28 2008]
a(n) = +15*a(n-1) -68*a(n-2) +96*a(n-3)
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MATHEMATICA
| Table[3^n + 4^n + 8^n, {n, 0, 20}]
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PROG
| (MAGMA) [3^n + 4^n + 8^n: n in [0..30]]; // Vincenzo Librandi, Jun 13 2011
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CROSSREFS
| Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
Sequence in context: A192253 A127785 A074541 * A205576 A173695 A025748
Adjacent sequences: A074547 A074548 A074549 * A074551 A074552 A074553
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KEYWORD
| easy,nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 23 2002
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