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%I #9 Jul 15 2021 09:13:07
%S 9,18,27,267,2667,26667,266667,2666667,26666667,266666667,2666666667,
%T 9063180828,9237472767,9411764706,9586056645,9760348584,9934640523,
%U 10108932462,10283224401,10457516340,10631808279,10806100218
%N Numbers k such that k^2 is the concatenation of two numbers 8*m and m.
%e 9^2 = 8_1.
%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