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A019484 G.f.: (8 + 7 x - 7 x^2 - 7 x^3)/(1 - 6 x - 7 x^2 + 5 x^3 + 6 x^4). 1
8, 55, 379, 2612, 18002, 124071, 855106, 5893451, 40618081, 279942687, 1929384798, 13297456486, 91647010581, 631637678776, 4353291555505, 30003193292641, 206784130187015, 1425170850320396, 9822378297435246 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Agrees with A010918 for terms 0 through 11056 but then differs from it.

REFERENCES

R. K. Guy, personal communication.

LINKS

Table of n, a(n) for n=0..18.

Index entries for linear recurrences with constant coefficients, signature (6,7,-5,-6).

MAPLE

- (8 + 7*x - 7*x^2 - 7*x^3) /(7*x^2 - 1 + 6*x - 6*x^4 - 5*x^3);

MATHEMATICA

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, May 16 2008 *)

CROSSREFS

Cf. A010918.

Sequence in context: A075734 A033890 A010924 * A010918 A108984 A264342

Adjacent sequences:  A019481 A019482 A019483 * A019485 A019486 A019487

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

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. - N. J. A. Sloane, May 16 2008

STATUS

approved

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Last modified March 25 09:41 EDT 2017. Contains 284060 sequences.