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Search: id:A019484
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| A019484 |
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G.f. (7*x^3+7*x^2-7*x-8)/(-6*x^4-5*x^3+7*x^2+6*x-1). |
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+0
2
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| 8, 55, 379, 2612, 18002, 124071, 855106, 5893451, 40618081, 279942687, 1929384798, 13297456486, 91647010581, 631637678776, 4353291555505, 30003193292641, 206784130187015, 1425170850320396, 9822378297435246
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Agrees with A010918 for terms 0 through 11056 but then differs from it.
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REFERENCES
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R. K. Guy, personal communication.
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MAPLE
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- (8 + 7*x - 7*x^2 - 7*x^3) /(7*x^2 - 1 + 6*x - 6*x^4 - 5*x^3);
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MATHEMATICA
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CoefficientList[ Series[(8 + 7 x - 7 x^2 - 7 x^3)/(1 - 6 x - 7 x^2 + 5 x^3 + 6 x^4), {x, 0, 18}], x] (* Robert G. Wilson v, (rgwv@rgwv.com), May 16 2008 *)
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CROSSREFS
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Cf. A010918.
Sequence in context: A033890 A010924 A010918 this_sequence A108984 A003722 A044146
Adjacent sequences: A019481 A019482 A019483 this_sequence A019485 A019486 A019487
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KEYWORD
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nonn
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AUTHOR
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njas
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EXTENSIONS
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The old definition was a(n) = 3*a(n-1) + a(n-2) - 2*a(n-3), but as R. J. Mathar pointed out, this did not match the entries. I have therefore replaced the definition with a g.f. found by Superseeker. - njas, May 16 2008
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