
6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30, 6, 30
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OFFSET

1,1


COMMENTS

Continued fraction expansion of (15+sqrt(230))/5. [From Klaus Brockhaus, Apr 28 2010]


LINKS

Table of n, a(n) for n=1..56.
Index entries for linear recurrences with constant coefficients, signature (0,1).


FORMULA

G.f.: 6x(1+5x)/((1x)(1+x)). a(n)=6*A010686(n1). [From Philippe Deléham, Sep 27 2009]
a(n)=18+12(1)^n, with n>=1 [From Paolo P. Lava, Sep 28 2009]


PROG

(PARI) a(n)=30n%2*24 \\ Charles R Greathouse IV, Jun 02 2011


CROSSREFS

Cf. A124886, A002445, A040214.
Sequence in context: A122802 A144746 A051685 * A260017 A123624 A287733
Adjacent sequences: A165731 A165732 A165733 * A165735 A165736 A165737


KEYWORD

nonn,easy


AUTHOR

Paul Curtz, Sep 25 2009


EXTENSIONS

Edited by N. J. A. Sloane, Sep 25 2009


STATUS

approved

