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A010730 (17 -3*(-1)^n)/2. 2
7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10, 7, 10 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

LINKS

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

FORMULA

Period 2.

a(n)=-3/2*(-1)^n+17/2 a(n)=10*(n mod 2)+7*[(n+1) mod 2] - Paolo P. Lava (paoloplava(AT)gmail.com), Oct 27 2006

G.f. ( -7-10*x ) / ( (x-1)*(1+x) ). - R. J. Mathar, Nov 21 2011

CROSSREFS

Sequence in context: A122577 A180732 A070405 * A079004 A192268 A117319

Adjacent sequences:  A010727 A010728 A010729 * A010731 A010732 A010733

KEYWORD

nonn

AUTHOR

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

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Last modified February 14 15:39 EST 2012. Contains 205635 sequences.