OFFSET
1,2
COMMENTS
Is a(n) odd for n>2 ? All odd numbers occur? Does equation a(x)=2m+1 have infinitely many solutions for any m>=1?
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Total/@Table[If[Divisible[Binomial[2n, 2k], Binomial[n, k]], 1, 0], {n, 90}, {k, n}] (* Harvey P. Dale, Jul 10 2012 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Apr 09 2003
STATUS
approved