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A074543
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2^n + 6^n + 9^n.
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1
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3, 17, 121, 953, 7873, 66857, 578161, 5063033, 44726593, 397498697, 3547251601, 31743858713, 284606322913, 2554926530537, 22955156635441, 206361317111993, 1855841298824833, 16694108359242377, 150196195253929681
(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/(1-6*x)+1/(1-9*x). E.g.f.: exp(2*x)+exp(6*x)+exp(9*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Dec 27 2008]
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MATHEMATICA
| Table[2^n + 6^n + 9^n, {n, 0, 20}]
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PROG
| (MAGMA) [2^n + 6^n + 9^n: n in [0..20]]; // Vincenzo Librandi, Jun 11 2011
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CROSSREFS
| Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
Sequence in context: A074544 A165976 A121572 * A129115 A093460 A187613
Adjacent sequences: A074540 A074541 A074542 * A074544 A074545 A074546
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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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