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A010676
Period 2: repeat [0, 5].
0
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
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
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
KEYWORD
nonn,easy
AUTHOR
STATUS
approved