%S A171673 1,3,20,86,97,110,176,187,266,277,356,367,
457,637,714,716,727,804,815,894,984,1087,1
1357,1436,1537,1614,1616,1627,1704,1715,1
2235,2257,2516,2694,2784,2885,3045,3135,3
3414,3427,3515,3594,3684,3785,3864,3875,3
%N A171673 Numbers n with property that both n and n^2 are self numbers (A003052).
%Y A171673 Cf. A003052 (Self or Colombian numbers), A171671 (Self squares),
A171672 (n^2 are self squares).
%K A171673 base,nonn
%O A171673 1,2
%A A171673 Zak Seidov (zakseidov(AT)yahoo.com), Dec 15 2009