%I #7 Jan 30 2016 04:10:38
%S 11123,12394,35123,50123,98123,111123,111230,111231,111232,111233,
%T 111234,111235,111236,111237,111238,111239,112394,123305,123463,
%U 123726,123743,123940,212394,312394,335123,351123,351230
%N Numbers n such that both n and n^2 contain "123" as a substring.
%H Zak Seidov, <a href="/A268278/b268278.txt">Table of n, a(n) for n = 1..3000</a>
%e 11_123_^2 = 123_721129.
%Y Subsequence of A178314. Cf. A175464.
%K nonn,base
%O 1,1
%A _Zak Seidov_, Jan 29 2016