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A074520
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1^n + 6^n + 7^n.
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0
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3, 14, 86, 560, 3698, 24584, 164306, 1103480, 7444418, 50431304, 342941426, 2340123800, 16018069538, 109949704424, 756587236946, 5217746494520, 36054040477058, 249557173431944, 1729973554578866, 12008254925383640
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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FORMULA
| G.f.:1/(1-x)+1/(1-6*x)+1/(1-7*x). E.g.f.: e^x+e^(6*x)+e^(7*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Dec 26 2008]
a(n) = 13*a(n-1) - 42*a(n-2) + 30, n>1 [From Gary Detlefs (gdetlefs(AT)aol.com), Jun 21 2010]
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MATHEMATICA
| Table[1^n + 6^n + 7^n, {n, 0, 20}]
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CROSSREFS
| Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
Sequence in context: A160881 A088716 A005189 * A127715 A087912 A051818
Adjacent sequences: A074517 A074518 A074519 * A074521 A074522 A074523
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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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