A010723 - OEIS

A010723

Period 2: repeat (6,7).

6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6

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OFFSET

0,1

COMMENTS

Continued fraction of 3 + sqrt(483)/7 = A176399. - R. J. Mathar, Nov 21 2011

LINKS

Table of n, a(n) for n=0..80.

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

FORMULA

a(n) = -(1/2)*(-1)^n + 13/2. - Paolo P. Lava, Oct 27 2006

G.f. (-6-7*x) / ( (x-1)*(1+x) ). - R. J. Mathar, Nov 21 2011

MATHEMATICA

Table[6 + Mod[n, 2], {n, 0, 50}] (* Jinyuan Wang, Feb 26 2020 *)

PadRight[{}, 120, {6, 7}] (* Harvey P. Dale, Mar 06 2024 *)

PROG

(PARI) a(n)=n%2+6 \\ Charles R Greathouse IV, Jul 13 2016

CROSSREFS

Sequence in context: A186282 A171909 A199079 * A244588 A336002 A223172

Adjacent sequences: A010720 A010721 A010722 * A010724 A010725 A010726

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved