OFFSET
1,1
COMMENTS
Checked all k < 10^8. a(1) has been proved. a(2) and a(3) are conjectured.
Checked all k < 10^9. a(4) is at least 537927682. - T. D. Noe, Jul 27 2005
EXAMPLE
a(1)=4 because binomial(8,4) is the largest squarefree central binomial coefficient. a(2)=1056 because binomial(2112,1056) is the largest cubefree.
CROSSREFS
KEYWORD
bref,nonn
AUTHOR
T. D. Noe, Jul 22 2005
STATUS
approved