Numbers k such that k^2 contains exactly 2 different digits, excluding 10^m, 2*10^m, 3*10^m.
A016070
Numbers k such that k^2 contains exactly 2 different digits, excluding 10^m, 2*10^m, 3*10^m.
Terms
- a(0) =4a(1) =5a(2) =6a(3) =7a(4) =8a(5) =9a(6) =11a(7) =12a(8) =15a(9) =21a(10) =22a(11) =26a(12) =38a(13) =88a(14) =109a(15) =173a(16) =212a(17) =235a(18) =264a(19) =3114a(20) =81619
External references
- oeis: A016070