OFFSET
1,2
LINKS
A. Granville and O. Ramaré, Explicit bounds on exponential sums and the scarcity of squarefree binomial coefficients, Mathematika 43 (1996), 73-107, [DOI].
MATHEMATICA
nn = 20; t = Table[-1, {nn}]; found = 0; n = -1; While[found < nn, n++; len = Length[Select[Binomial[n, Range[0, n/2]], SquareFreeQ[#] &]]; If[0 < len <= nn && t[[len]] == -1, t[[len]] = n; found++]]; t
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
T. D. Noe, Mar 05 2014
EXTENSIONS
Extended by T. D. Noe, Mar 07 2014
STATUS
approved