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Search: id:A074513
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| 3, 12, 66, 408, 2658, 17832, 121746, 839928, 5830338, 40615752, 283523826, 1981521048, 13858064418, 96956119272, 678491508306, 4748635251768, 33237225536898, 232647693856392, 1628482317387186, 11399170063280088
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OFFSET
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0,1
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FORMULA
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G.f.: 1/(1-x)+1/(1-4*x)+1/(1-7*x). E.g.f.: e^x+e^(4*x)+e^(7*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Dec 26 2008]
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MATHEMATICA
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Table[1^n + 4^n + 7^n, {n, 0, 20}]
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CROSSREFS
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Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
Sequence in context: A007017 A082987 A086836 this_sequence A007871 A058790 A080599
Adjacent sequences: A074510 A074511 A074512 this_sequence A074514 A074515 A074516
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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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