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A074523
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1^n + 7^n + 8^n.
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0
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3, 16, 114, 856, 6498, 49576, 379794, 2920696, 22542018, 174571336, 1356217074, 10567261336, 82560763938, 646644824296, 5076269583954, 39931933598776, 314707907280258, 2484430327672456, 19642812107392434, 155514083261229016
(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/(1-7*x)+1/(1-8*x). E.g.f.: e^x+e^(7*x)+e^(8*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Dec 26 2008]
a(n)=15*a(n-1)-56*a(n-2)+42 with a(0)=3, a(1)=16 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]
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MATHEMATICA
| Table[1^n + 7^n + 8^n, {n, 0, 20}]
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CROSSREFS
| Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
Sequence in context: A097142 A005419 A124537 * A042437 A159606 A177402
Adjacent sequences: A074520 A074521 A074522 * A074524 A074525 A074526
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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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