OFFSET
1,2
COMMENTS
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..192
MATHEMATICA
DeleteDuplicates[Table[{n, GCD@@Array[Binomial[2 n, 2 #]&, {n-1}]}, {n, 2350}], GreaterEqual[ #1[[2]], #2[[2]]]&][[All, 1]] (* Harvey P. Dale, Jul 19 2022 *)
PROG
(PARI) lista(nn) = {r = 0; for (n=1, nn, nr = gcd(vector(n-1, k, binomial(2*n, 2*k))); if (nr > r, print1(n, ", "); r = nr); ); } \\ Michel Marcus, Dec 08 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 08 2015
STATUS
approved