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A010678 Period 2: repeat (0,7). 0
0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

LINKS

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

FORMULA

a(n)=(7/2)*[1-(-1)^n]; a(n)=7*(n mod 2). - Paolo P. Lava (paoloplava(AT)gmail.com), Oct 20 2006

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

CROSSREFS

Sequence in context: A188928 A036479 A085966 * A010503 A158857 A011438

Adjacent sequences:  A010675 A010676 A010677 * A010679 A010680 A010681

KEYWORD

nonn

AUTHOR

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

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Last modified February 15 20:03 EST 2012. Contains 205852 sequences.