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A074555
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3^n + 6^n + 7^n.
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1
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3, 16, 94, 586, 3778, 24826, 165034, 1105666, 7450978, 50450986, 343000474, 2340300946, 16018600978, 109951298746, 756592019914, 5217760843426, 36054083523778, 249557302572106, 1729973941999354, 12008256087645106
(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..1000
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FORMULA
| G.f.: 1/(1-3*x)+1/(1-6*x)+1/(1-7*x). E.g.f.: exp(3*x)+exp(6*x)+exp(7*x). [From Mohammad K. Azarian, Dec 30 2008]
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MATHEMATICA
| Table[3^n + 6^n + 7^n, {n, 0, 20}]
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PROG
| (MAGMA) [3^n + 6^n + 7^n: n in [0..20]]; // Vincenzo Librandi, Aug 24 2011
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CROSSREFS
| Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
Sequence in context: A009124 A067679 A099952 * A137644 A114174 A181067
Adjacent sequences: A074552 A074553 A074554 * A074556 A074557 A074558
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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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