%I #4 Dec 05 2013 19:55:56
%S 1,6,384,2856,22727,188679,1612903,14084506,124999999,112359549631,
%T 1111234572418,1019369022515831,9409019496692991,873646201597158837,
%U 815363874644766139852,76437144029054504848414,719381682508917578872474,679393593475575516018040602
%N A078206(n)/A000422(n)
%e a(3) = 384 = 123264/321.
%Y Cf. A078206.
%K base,nonn
%O 1,2
%A _Amarnath Murthy_, Nov 22 2002
%E Edited and extended by _Max Alekseyev_, May 13 2009