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%I #7 May 18 2013 16:49:27
%S 4,9,284,61209,14204828164,4440027571600000000001,
%T 7667716927194638935286982918857620344809476
%N Smallest positive number whose digits concatenated with all previous terms forms a perfect square.
%D A. Murthy, Smar. Notions J. Vol. 11 N. 1-2-3 Spring 2000.
%e 284 belongs to the sequence because 49284=222^2.
%Y Cf. A048559, A048560, A051670.
%K nice,nonn,easy,base
%O 0,1
%A _Felice Russo_
%E More terms from _Patrick De Geest_, Dec 15 1999
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