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Search: id:A074559
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| 3, 19, 139, 1099, 9043, 76099, 649819, 5608699, 48818083, 427793779, 3769318699, 33358563499, 296271355123, 2638756433059, 23555020310779, 210638707953499, 1886253162468163, 16909812342793939, 151723049282330059
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OFFSET
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0,1
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FORMULA
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G.f.: 1/(1-3*x)+1/(1-7*x)+1/(1-9*x). E.g.f.: e^(3*x)+e^(7*x)+e^(9*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Dec 30 2008]
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MATHEMATICA
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Table[3^n + 7^n + 9^n, {n, 0, 20}]
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CROSSREFS
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Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
Sequence in context: A115750 A156894 A073515 this_sequence A027314 A025571 A082758
Adjacent sequences: A074556 A074557 A074558 this_sequence A074560 A074561 A074562
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KEYWORD
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easy,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 23 2002
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