%I
%S 2,3,5,19,1093,12721,4062241
%N a(n) = least k such that A048825(k) = n.
%Y Cf. A048827.
%K nonn,more
%O 0,1
%A _Christian G. Bower_, May 15 1999
%E a(6) from _Max Alekseyev_, Jun 13 2011
