%I A081767
%S A081767 2,16,21,29,43,46,67,78,89,92,105,111,141,154,157,171,188,191,205,210,
%T A081767 211,221,229,232,239,241,267,277,300,309,313,316,323,326,331,346,369,
%U A081767 379,415,421,430,436,441,443,451,460,461,465,469,477,484,494,497,528
%N A081767 Numbers n such that n^2-1 divides binomial(2n,n).
%C A081767 Is a(n) asymptotic to c*n with 9<c<10 ?
%C A081767 Except for 2, a subset of A004782.
%Y A081767 Sequence in context: A161802 A050850 A082475 this_sequence A093026 A118954 
               A119599
%Y A081767 Adjacent sequences: A081764 A081765 A081766 this_sequence A081768 A081769 
               A081770
%K A081767 easy,nonn
%O A081767 1,1
%A A081767 Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 09 2003