A078187 - OEIS

%I #8 Dec 05 2013 19:55:56

%S 1,4,49,225,441,576,784,1296,2304,5041,7396,8464,9409,12769,17689,

%T 18496,21609,23104,26569,30276,32041,34596,36481,40401,45369,53824,

%U 55696,62001,69169,71289,77284,116964,121104,123904,148996

%N Smaller of the two successive squares which differ in the use of only one digit.

%C Sequence is infinite.  Consider squaring 2*10^k+1 and 2*10^k+2 for k >= 1: (441, 484), (40401, 40804), (4004001, 4008004), etc.

%e 1296 is a member as 1296 and 1369 differ in the use of only one digit i.e. 2 and 3.

%K nonn,base

%O 1,2

%A _Amarnath Murthy_, Nov 21 2002

%E Extended and edited by _D. S. McNeil_, Nov 20 2010