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%I #6 Dec 05 2013 19:55:05
%S 1,49,162,5364,96481,100121,1441691,96225256,289324361,4004414845,
%T 29576625676,729784841900,9611024108911,56122512961369,
%U 144415211600168,1176418491936202,52116220923042401,250026012704280929
%N Let N =149162536496481100121441691962252562893243614..., the concatenation of the squares. a(n) is the n-digit number formed from the digits of N starting from the {n(n-1)/2 +1}th digit. Omit any leading zeros.
%C Are there any squares in this sequence other than 1 and 49?
%t With[{c=Flatten[IntegerDigits/@(Range[100]^2)]},Table[FromDigits[Take[c,{(n(n-1))/2+1,(n(n-1))/2+n}]],{n,20}]] (* _Harvey P. Dale_, Jul 21 2012 *)
%Y Cf. A066547, A066549.
%K nonn,base
%O 1,2
%A _Amarnath Murthy_, Dec 16 2001
%E Corrected and extended by _Lior Manor_ Feb 13 2002