OFFSET
0,1
COMMENTS
Also decimal expansion of 25/99.
Continued fraction expansion of A176052. - R. J. Mathar, Mar 08 2012
LINKS
FORMULA
G.f.: (2+5*x)/((1-x)*(1+x)). - R. J. Mathar, Nov 21 2011
a(n) = 2^(1-(-1)^n) + 1. [Bruno Berselli, Dec 29 2015]
From Nicolas Bělohoubek, Nov 11 2021: (Start)
a(n) = 10/a(n-1). See also A010691.
a(n) = 7 - a(n-1). See also A010702. (End)
PROG
(Maxima) makelist(if evenp(n) then 2 else 5, n, 0, 80); /* Martin Ettl, Nov 09 2012 */
(Magma) &cat [[2, 5]^^50]; // Bruno Berselli, Dec 29 2015
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Edited by Bruno Berselli, Dec 29 2015
STATUS
approved