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A165222 a(n) = (2^(n+4)+1)*(2^n+1). 0
34, 99, 325, 1161, 4369, 16929, 66625, 264321, 1052929, 4203009, 16794625, 67143681, 268505089, 1073881089, 4295245825, 17180426241, 68720590849, 274880135169, 1099516084225, 4398055424001, 17592203870209, 70368779829249 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..21.

FORMULA

a(n) = 7*a(n-1) -14*a(n-2)+8*a(n-3). G.f.: (34-139*x+108*x^2)/((1-x)*(2*x-1)*(4*x-1)). - R. J. Mathar, Sep 20 2009

a(n) = A000051(n) * A000051(n+4). - Michel Marcus, Jul 17 2013

PROG

(PARI) a(n) = (2^(n+4)+1)*(2^n+1) \\ Michel Marcus, Jul 17 2013

CROSSREFS

Sequence in context: A044602 A159904 A282854 * A173308 A044285 A044666

Adjacent sequences:  A165219 A165220 A165221 * A165223 A165224 A165225

KEYWORD

nonn,easy

AUTHOR

Boris Hostnik (megpplus(AT)siol.net), Sep 08 2009

EXTENSIONS

Two initial fractional values removed by R. J. Mathar, Sep 20 2009

STATUS

approved

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Last modified October 21 04:26 EDT 2019. Contains 328291 sequences. (Running on oeis4.)