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A010718 Periodic sequence: Repeat 5,7. 4
5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5, 7, 5 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

Also continued fraction expansion of (35+sqrt(1365))/14. - Bruno Berselli, Sep 29 2011

LINKS

Index to sequences with linear recurrences with constant coefficients, signature (0,1).

FORMULA

a(n) = (-1)^(n+1)+6. a(n)=7*(n mod 2)+5*((n+1) mod 2). - Paolo P. Lava, Oct 20 2006

a(n) = a(n-2) for n > 1; a(0)=5, a(1)=7. G.f.: (5+7*x)/((1-x)*(1+x)). - Vincenzo Librandi, Aug 01 2010

CROSSREFS

Sequence in context: A011205 A167133 A144567 * A090987 A195498 A065746

Adjacent sequences:  A010715 A010716 A010717 * A010719 A010720 A010721

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

Definition rewritten by Bruno Berselli, Sep 29 2011

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Last modified February 17 02:48 EST 2012. Contains 205978 sequences.