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Search: id:A053566
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| A053566 |
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A second order recursive sequence. |
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+0
1
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| -2, -1, 12, 81, 378, 1539, 5832, 21141, 74358, 255879, 866052, 2893401, 9565938, 31355019, 102036672, 330024861, 1061819118, 3400690959, 10847773692, 34480423521, 109252577898, 345191655699
(list; graph; listen)
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OFFSET
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0,1
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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)=(3^(n-1))(5n-6).
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EXAMPLE
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a(n)=6a(n-1)-9a(n-2); a(0)=-2, a(1)=-1.
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CROSSREFS
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Cf. A023444.
Adjacent sequences: A053563 A053564 A053565 this_sequence A053567 A053568 A053569
Sequence in context: A012590 A012291 A012585 this_sequence A009483 A124916 A007418
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KEYWORD
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easy,sign
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AUTHOR
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Barry E. Williams, Jan 17 2000
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