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A053566
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A second order recursive sequence.
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0
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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; refs; listen; history; internal format)
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OFFSET
| 0,1
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REFERENCES
| A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, pp. 189, 194-196.
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FORMULA
| a(n)=(3^(n-1))(5n-6).
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EXAMPLE
| a(n)=6a(n-1)-9a(n-2); a(0)=-2, a(1)=-1.
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CROSSREFS
| Cf. A023444.
Sequence in context: A012590 A012291 A012585 * A009483 A181867 A171510
Adjacent sequences: A053563 A053564 A053565 * A053567 A053568 A053569
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KEYWORD
| easy,sign
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AUTHOR
| Barry E. Williams, Jan 17 2000
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