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A106438
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G.f.: x(2-5x-2x^2)/(1-6x+9x^2-x^4)
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0
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0, 2, 7, 22, 69, 218, 694, 2224, 7167, 23204, 75415, 245878, 803700, 2632502, 8637127, 28376122, 93326289, 307205138, 1011931354, 3335118004, 10996652127, 36271055864, 119668397395, 394905999598, 1303417073160, 4302619498442
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| (1/2) [Lucas(2n-1) + A006190(n+1) ]. - Ralf Stephan, Jun 2 2007
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MATHEMATICA
| v[1] = {0, 1, 1, 2}; v[n_] := v[n] = M.v[n - 1]; digits = 50; a = Table[v[n][[1]], {n, 1, digits}]
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CROSSREFS
| Cf. A001906, A006190.
Sequence in context: A037552 A094618 A077833 * A109999 A092690 A030186
Adjacent sequences: A106435 A106436 A106437 * A106439 A106440 A106441
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KEYWORD
| nonn
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AUTHOR
| Roger L. Bagula (rlbagulatftn(AT)yahoo.com), May 29 2005
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EXTENSIONS
| Edited by the Associate Editors of the OEIS, Apr 09 2009
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