%I A023055
%S A023055 1,2,3,4,5,7,8,9,10,11,12,13,15,16,17,18,19,20,21,23,24,25,26,27,28,30,
%T A023055 32,33,35,36,37,38,39,40,41,43,45,47,48,49,51,53,55,56,57,59,60,61,63,
               65,
%U A023055 67,68,69,71,73,74,75,76,77,79,80,81,83,85,87,89,92,93,94,95,97,99,100
%N A023055 (Apparently) differences between adjacent perfect powers (integers of 
               form a^b, a >= 1, b >= 2).
%C A023055 Catalan's conjecture (now a theorem) is that 1 occurs just once as a 
               difference, between 8 and 9.
%H A023055 Alf van der Poorten, <a href="a023057.txt">Remarks on the sequence of 
               'perfect' powers</a>
%Y A023055 Cf. A001597, A023057.
%Y A023055 Sequence in context: A088451 A047595 A079298 this_sequence A047368 A037470 
               A020657
%Y A023055 Adjacent sequences: A023052 A023053 A023054 this_sequence A023056 A023057 
               A023058
%K A023055 nonn,hard
%O A023055 1,2
%A A023055 David W. Wilson (davidwwilson(AT)comcast.net)