%I A078726
%S A078726 3,5,17,257,35567,2244677999,111344445566777789,
%T A078726 111222233333334444445666666777788899,
%U A078726 111111222223333333344444455555555566666666777777778888888999999999999
%N A078726 Fermat numbers 2^(2^n) + 1 with digits sorted in increasing order and 
               zeros suppressed.
%C A078726 The 0, 1, 2, 3, 5 and 7 terms of this sequence are primes. Are there 
               any more?
%Y A078726 Cf. A000215.
%Y A078726 Sequence in context: A058910 A023394 A056130 this_sequence A019434 A164307 
               A125045
%Y A078726 Adjacent sequences: A078723 A078724 A078725 this_sequence A078727 A078728 
               A078729
%K A078726 base,nonn,nice
%O A078726 0,1
%A A078726 Jason Earls (zevi_35711(AT)yahoo.com), Dec 20 2002