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A074524
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1^n + 7^n + 9^n.
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0
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3, 17, 131, 1073, 8963, 75857, 649091, 5606513, 48811523, 427774097, 3769259651, 33358386353, 296270823683, 2638754838737, 23555015527811, 210638693604593, 1886253119421443, 16909812213653777, 151723048894909571
(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/(1-9*x). E.g.f.: e^x+e^(7*x)+e^(9*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Dec 26 2008]
a(n)=16*a(n-1)-63*a(n-2)+48 with a(0)=3, a(1)=17 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]
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MATHEMATICA
| Table[1^n + 7^n + 9^n, {n, 0, 20}]
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CROSSREFS
| Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
Sequence in context: A089815 A006759 A073513 * A163684 A093986 A192459
Adjacent sequences: A074521 A074522 A074523 * A074525 A074526 A074527
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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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