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A074517
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1^n + 5^n + 7^n.
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0
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3, 13, 75, 469, 3027, 19933, 133275, 901669, 6155427, 42306733, 292240875, 2026154869, 14085427827, 98109713533, 684326588475, 4778079088069, 33385518460227, 233393453440333, 1632228295176075, 11417968671701269
(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/(1-5*x)+1/(1-7*x). E.g.f.: e^x+e^(5*x)*e^(7*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Dec 26 2008]
a(n)=12*a(n-1)-35*a(n-2)+24 with a(0)=3, a(1)=13 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jul 21 2010]
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MATHEMATICA
| Table[1^n + 5^n + 7^n, {n, 0, 20}]
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CROSSREFS
| Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
Sequence in context: A009382 A110193 A038762 * A007178 A173990 A034172
Adjacent sequences: A074514 A074515 A074516 * A074518 A074519 A074520
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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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