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A074544
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2^n + 7^n + 8^n.
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1
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3, 17, 117, 863, 6513, 49607, 379857, 2920823, 22542273, 174571847, 1356218097, 10567263383, 82560768033, 646644832487, 5076269600337, 39931933631543, 314707907345793, 2484430327803527, 19642812107654577, 155514083261753303
(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/(1-2*x)+1/(1-7*x)+1/(1-8*x). E.g.f.: exp(2*x)+exp(7*x)+exp(8*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Dec 28 2008]
a(n) = +17*a(n-1) -86*a(n-2) +112*a(n-3)
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MATHEMATICA
| Table[2^n + 7^n + 8^n, {n, 0, 20}]
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PROG
| (MAGMA) [ 2^n + 7^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: A174404 A112111 A074554 * A165976 A121572 A074543
Adjacent sequences: A074541 A074542 A074543 * A074545 A074546 A074547
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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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