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Search: id:A108208
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| A108208 |
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Derangement type quadratic vector Markov. |
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+0
1
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| 0, 2, 8, 56, 624, 9536, 184480, 4313088, 118183744, 3712870400, 131536027008, 5187183672320, 225342288987904, 10691937463283712, 550121848577067520, 30507449271343837184, 1813943300823318205440, 115116132876009362358272
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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M[n]={{0, -2}, {(n - 1), 4*(n - 1)}} v[n] = M[n].v[n - 1] a(n) = Abs[v[n][[1]]]
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MATHEMATICA
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M[n_] := {{0, -2}, {(n - 1), 4*(n - 1)}} v[1] = {0, 1} v[n_] := v[n] = M[n].v[n - 1] a = Table[Abs[v[n][[1]]], {n, 1, 25}]
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CROSSREFS
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Cf. A000166.
Sequence in context: A124212 A005439 A128814 this_sequence A135079 A084872 A113725
Adjacent sequences: A108205 A108206 A108207 this_sequence A108209 A108210 A108211
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KEYWORD
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nonn,uned
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Jun 15 2005
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