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Search: id:A123011
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| A123011 |
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Scaled 2 X 2 rational vector matrix Markov: characteristic polynomial: -1/5- 2 x/5 + x^2. |
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+0
1
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| 1, 5, 15, 55, 185, 645, 2215, 7655, 26385, 91045, 314015, 1083255, 3736585, 12889445, 44461815, 153370855, 529050785, 1824955845, 6295165615, 21715110455, 74906048985, 258387650245, 891305545415, 3074549342055
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OFFSET
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1,2
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FORMULA
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M := {{0, 1}, {1/5, 2/5}}; v[1] = {1, 1}; v[n_] := v[n] = M.v[n - 1]; a(n) = v[n][[1]]
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MATHEMATICA
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M := {{0, 1}, {1/5, 2/5}}; v[1] = {1, 1}; v[n_] := v[n] = M.v[n - 1]; a = Table[v[n][[1]]*5^(n - 1), {n, 1, 30}]
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CROSSREFS
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Sequence in context: A109245 A002221 A007714 this_sequence A006358 A054108 A114947
Adjacent sequences: A123008 A123009 A123010 this_sequence A123012 A123013 A123014
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KEYWORD
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nonn,uned
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AUTHOR
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Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 23 2006
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