OFFSET
2,3
COMMENTS
The series of fractions A027760(n+1)/n = 2/2, 30/3, 2/4, 42/5, 2/6, 30/7, 2/8, 66/9, 2/10, ... = 1, 10, 1/2, 42/5, 1/3, 30/7, 1/4, ... for n>=2 is represented here by the reduced denominators.
FORMULA
a(2n) = n.
MAPLE
seq(A141410(n), n=2..80) ; # R. J. Mathar, Jul 08 2011
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Paul Curtz, Aug 04 2008
STATUS
approved