A010730 a(n) = (17 -3*(-1)^n)/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

Offset

0,1

Comments

Period 2.

Links

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

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

Formula

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

a(n) = 7 + 2^(1 - (-1)^n) - 1. - Vincenzo Librandi, Feb 28 2020

Mathematica

PadRight[{}, 120, {7, 10}] (* Harvey P. Dale, Jul 08 2019 *)

Prog

(Magma) &cat [[7, 10]^^50]; // Vincenzo Librandi, Feb 28 2020

Crossrefs

Sequence in context: A180732 A266551 A070405 * A225694 A247191 A317336

Adjacent sequences: A010727 A010728 A010729 * A010731 A010732 A010733

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved