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A063396 T(3,n) with T(n,m) as in A063394. 4
1, 15, 47, 131, 343, 863, 2111, 5055, 11903, 27647, 63487, 144383, 325631, 729087, 1622015, 3588095, 7897087, 17301503, 37748735, 82051071, 177733631, 383778815, 826277887, 1774190591, 3800039423, 8120172543, 17314086911, 36842766335, 78248935423 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Colin Barker, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (7,-18,20,-8)

FORMULA

For n>0, 1/4 * [(n+1)(n+2)2^n + 10(n+1)2^n + 6*2^n - 4]. - Ralf Stephan, May 08 2004

G.f.: -(20*x^4-52*x^3+40*x^2-8*x-1) / ((x-1)*(2*x-1)^3). - Colin Barker, May 27 2015

MATHEMATICA

Join[{1}, LinearRecurrence[{7, -18, 20, -8}, {15, 47, 131, 343}, 30]] (* Harvey P. Dale, Jul 31 2014 *)

PROG

(PARI) Vec(-(20*x^4-52*x^3+40*x^2-8*x-1)/((x-1)*(2*x-1)^3) + O(x^100)) \\ Colin Barker, May 27 2015

CROSSREFS

Cf. A063394, A063397, A063398.

Sequence in context: A143031 A214675 A166118 * A236401 A000813 A156205

Adjacent sequences:  A063393 A063394 A063395 * A063397 A063398 A063399

KEYWORD

nonn,easy

AUTHOR

Floor van Lamoen, Jul 16 2001

STATUS

approved

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Last modified November 30 06:28 EST 2021. Contains 349419 sequences. (Running on oeis4.)