OFFSET
2,3
LINKS
Michael De Vlieger, Table of n, a(n) for n = 2..1000
EXAMPLE
For n = 6, the numbers on the row are 1, 6, 15 and 20 and the gcd's of pairs of these are 1, 3, 2 and 5. So a(6) = 5.
MATHEMATICA
Max /@ (GCD[#1, #2] & @@@ Subsets[#, {2}] & /@ Table[Binomial[n, k], {n, 2, 36}, {k, 0, Floor[n/2]}]) (* Michael De Vlieger, Feb 26 2016 *)
PROG
(PARI) mg(n) = {my(m = 0, v = vecsort(vector(n+1, k, k--; binomial(n, k)), , 8)); for (k=2, #v, for (j=1, k-1, m = max(m, gcd(v[k], v[j])); ); ); m; } \\ Michel Marcus, Feb 26 2016
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
David Wasserman, Mar 21 2004
STATUS
approved