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Search: id:A127210
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| 3, 27, 108, 567, 2673, 13122, 63423, 308367, 1495908, 7263027, 35252253, 171124002, 830642283, 4032042867, 19571909148, 95004113247, 461159522073, 2238515585442, 10865982454983, 52744587633927
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OFFSET
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1,1
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FORMULA
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a(n) = Trace of matrix [({3,3},{3,0})^n] a(n) = 3^n Trace of matrix [({1,1},{1,0})^n]
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MATHEMATICA
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Table[3^n Tr[MatrixPower[{{1, 1}, {1, 0}}, x]], {x, 1, 20}]
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CROSSREFS
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Cf. A087131, A127211, A127212, A127213, A127214, A127215, A127216.
Sequence in context: A053360 A120117 A045491 this_sequence A063263 A034200 A080424
Adjacent sequences: A127207 A127208 A127209 this_sequence A127211 A127212 A127213
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Jan 09 2007
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