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A010697 Period 2: repeat (2,7). 4
2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

LINKS

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

FORMULA

a(n)=-5/2*(-1)^n+9/2 =7*(n mod 2)+2*[(n+1) mod 2] - Paolo P. Lava (paoloplava(AT)gmail.com), Oct 20 2006

G.f.: (2+7x)/((1-x)(1+x)). - R. J. Mathar, Nov 21 2011

CROSSREFS

Sequence in context: A102447 A151869 A181284 * A088666 A170854 A197133

Adjacent sequences:  A010694 A010695 A010696 * A010698 A010699 A010700

KEYWORD

nonn

AUTHOR

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

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Last modified February 15 05:09 EST 2012. Contains 205694 sequences.