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%I #8 Jul 15 2021 21:22:36
%S 85714286,128571429,171428572,69230769231,92307692308,115384615385,
%T 138461538462,161538461539,
%U 85714285714285714285714285714285714285714285714286
%N Numbers k such that k^2 is the concatenation of two numbers 3*m and m.
%e 85714286^2 = 73469388_24489796.
%Y Cf. A102567, A106497, A115527 - A115556.
%K nonn,base
%O 1,1
%A _Giovanni Resta_, Jan 25 2006
%E Definition modified by _Georg Fischer_, Jul 26 2019