OFFSET
1,4
LINKS
Y. Chen and others, Variation of a Ukrainian Olympiad Problem: Problem 10982, Amer. Math. Monthly, 111 (No. 7, 2004), 631-632.
FORMULA
f(n) -> n + 1/2.
EXAMPLE
1, 4, 4, 169/36, 555025/97344, 14291007025/2161134144, ...
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
N. J. A. Sloane, Aug 29 2004
STATUS
approved