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%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