%I A090516
%S A090516 1,4,8,9,16,25,27,32,36,49,64,81,121,125,128,169,196,216,243,256,289,
%T A090516 324,343,361,484,512,529,576,625,676,729,784,841,961,1024,1089,1296,
%U A090516 1369,1521,1681,1728,1764,1849,1936,2025,2048,2187,2197,2304,2401,2601
%N A090516 Perfect powers (at least a square) in which neighboring digits are distinct.
%C A090516 Sequence must be infinite but a proof is needed. Subsidiary sequences; 
               Perfect squares or perfect cubes etc. in which neighboring digits 
               are distinct.
%Y A090516 Cf. A001597 (perfect powers), A075309 (distinct-digit perfect powers).
%Y A090516 Sequence in context: A001597 A072777 A076292 this_sequence A090515 A075309 
               A175031
%Y A090516 Adjacent sequences: A090513 A090514 A090515 this_sequence A090517 A090518 
               A090519
%K A090516 base,easy,nonn
%O A090516 0,2
%A A090516 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 06 2003
%E A090516 Corrected and extended by Rick L. Shepherd (rshepherd2(AT)hotmail.com), 
               Jul 01 2005