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A083333 a(n)=10a(n-2)-16a(n-4). 1
1, 1, 6, 10, 44, 84, 344, 680, 2736, 5456, 21856, 43680, 174784, 349504, 1398144, 2796160, 11184896, 22369536, 89478656, 178956800, 715828224, 1431655424, 5726623744, 11453245440, 45812985856, 91625967616, 366503878656 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

A083332(n)/a(n) converges to 3.

LINKS

Table of n, a(n) for n=0..26.

FORMULA

G.f.: (1+x-4x^2)/(1-10x^2+16x^4)

a(n)=A016116(n)*A001045(n+1). [From R. J. Mathar, Jul 08 2009]

MATHEMATICA

CoefficientList[Series[(1+x-4x^2)/(1-10x^2+16x^4), {x, 0, 30}], x]

CROSSREFS

Cf. A016131, A082412 (bisections). [From R. J. Mathar, Jul 13 2009]

Sequence in context: A132095 A153328 A068588 * A032359 A115917 A275004

Adjacent sequences:  A083330 A083331 A083332 * A083334 A083335 A083336

KEYWORD

easy,nonn

AUTHOR

Mario Catalani (mario.catalani(AT)unito.it), Apr 24 2003

STATUS

approved

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Last modified March 28 15:38 EDT 2017. Contains 284243 sequences.