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A010735 Period 2: repeat (9,10). 3
9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10, 9, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Continued fraction expansion of A176523. - R. J. Mathar, Mar 08 2012

LINKS

Table of n, a(n) for n=0..65.

Index entries for linear recurrences with constant coefficients, signature (0,1).

FORMULA

a(n)=-1/2*(-1)^n+19/2 =10*(n mod 2)+9*[(n+1) mod 2] - Paolo P. Lava, Oct 27 2006

G.f. ( -9-10*x ) / ( (x-1)*(1+x) ). - R. J. Mathar, Nov 21 2011

PROG

(PARI) a(n)=n%2+9 \\ Charles R Greathouse IV, Jul 13 2016

CROSSREFS

Sequence in context: A020508 A158001 A157763 * A063543 A096166 A240919

Adjacent sequences:  A010732 A010733 A010734 * A010736 A010737 A010738

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified July 15 14:07 EDT 2019. Contains 325030 sequences. (Running on oeis4.)