A010676 Period 2: repeat [0, 5].

0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0

Offset

0,2

Comments

Decimal expansion of 5/99. - Elmo R. Oliveira, Sep 27 2025

Links

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

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

Formula

a(n) = (5/2)*(1 - (-1)^n) = 5*(n mod 2). - Paolo P. Lava, Oct 20 2006

G.f.: 5*x/((1-x)*(1+x)). - R. J. Mathar, Nov 21 2011

a(n) = a(n-2). - Wesley Ivan Hurt, Aug 19 2022

E.g.f.: 5*sinh(x). - Elmo R. Oliveira, Sep 27 2025

Mathematica

PadRight[{}, 120, {0, 5}] (* Harvey P. Dale, Feb 18 2013 *)

Prog

(Magma) &cat [[0, 5]^^50]; // Bruno Berselli, Dec 10 2015
(PARI) a(n)=n%2*5 \\ Charles R Greathouse IV, Jul 23 2016

Crossrefs

Sequence in context: A199092 A167260 A137520 * A071873 A036478 A059628

Adjacent sequences: A010673 A010674 A010675 * A010677 A010678 A010679

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved