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 A207982 Least m>1 such that all central binomial coefficients C(2k,k), k<=n, are pairwise not congruent mod m. 11
 2, 3, 5, 11, 11, 11, 23, 23, 23, 31, 43, 43, 43, 43, 59, 59, 59, 59, 107, 149, 151, 151, 151, 151, 163, 163, 163, 163, 163, 163, 163, 163, 163, 277, 277, 277, 277, 401, 401, 457, 457, 457, 457, 457, 457, 457, 479, 479, 479, 479, 479, 479, 479, 479, 479, 479 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Chai Wah Wu, Table of n, a(n) for n = 1..5000 Z. W. Sun, A function taking only prime values, Number Theory list, Feb 21 2012 PROG (PARI) m=2; for(n=1, 99, forstep(nn=n, 2, -1, for(k=1, nn-1, (binomial(nn*2, nn)-binomial(2*k, k))%m&next; m++; nn=n+1; next(2))); print1(m", ")) CROSSREFS Sequence in context: A258975 A111214 A272197 * A259155 A354400 A210144 Adjacent sequences:  A207979 A207980 A207981 * A207983 A207984 A207985 KEYWORD nonn AUTHOR M. F. Hasler, Feb 22 2012 STATUS approved

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Last modified August 19 20:38 EDT 2022. Contains 356231 sequences. (Running on oeis4.)