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A113443 Fourth row of A113439. 1
1, 5, 23, 101, 436, 1871, 8014, 34309, 146868, 628708, 2691401, 11521603, 49323052, 211148530, 903912916, 3869592721, 16565477544, 70915744968, 303585747088, 1299631069856, 5563637060865, 23817572559345, 101961496787621 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (9,-28,38,-20,1).

FORMULA

a(n) = A113439(4*n+3).

a(n) = 9*a(n-1) - 28*a(n-2) + 38*a(n-3) - 20*a(n-4) + a(n-5).

G.f.: -(1-4*x+6*x^2-4*x^3+x^4)/(-1+9*x-28*x^2+38*x^3-20*x^4+x^5).

MATHEMATICA

CoefficientList[Series[-(1 - 4*x + 6*x^2 - 4*x^3 + x^4)/(-1 + 9*x - 28*x^2 + 38*x^3 - 20*x^4 + x^5), {x, 0, 50}], x] (* G. C. Greubel, Mar 11 2017 *)

PROG

(PARI) x='x+O('x^50); Vec(-(1-4*x+6*x^2-4*x^3+x^4)/(-1+9*x-28*x^2 +38*x^3 -20*x^4+x^5)) \\ G. C. Greubel, Mar 11 2017

CROSSREFS

Cf. A113439.

Sequence in context: A229008 A274322 A085350 * A124999 A258431 A120902

Adjacent sequences:  A113440 A113441 A113442 * A113444 A113445 A113446

KEYWORD

nonn

AUTHOR

Floor van Lamoen, Nov 04 2005

STATUS

approved

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Last modified July 26 16:44 EDT 2021. Contains 346294 sequences. (Running on oeis4.)