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Search: id:A053573
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| A053573 |
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A second order recursive sequence. |
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+0
2
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| 1, 5, 39, 265, 1871, 13065, 91519, 640505, 4483791, 31386025, 219703199, 1537920345, 10765446511, 75358117385, 527506838079
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, pp. 189, 194-196.
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FORMULA
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a(n)=[(7^(n+1))-(-2)^(n+1)]/9. a(n)=5a(n-1)+14a(n-2), a(0)=1.
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CROSSREFS
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Sequence in context: A064445 A123614 A075135 this_sequence A003482 A135849 A105426
Adjacent sequences: A053570 A053571 A053572 this_sequence A053574 A053575 A053576
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KEYWORD
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easy,nonn
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AUTHOR
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Barry E. Williams, Jan 18 2000
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