Numbers n such that the decimal expansions of both n and n^2 have 1 as smallest digit and 7 as largest digit.
A257210
Numbers n such that the decimal expansions of both n and n^2 have 1 as smallest digit and 7 as largest digit.
Terms
- a(0) =271a(1) =371a(2) =1171a(3) =1474a(4) =1475a(5) =1776a(6) =2171a(7) =2271a(8) =2671a(9) =2715a(10) =2761a(11) =3671a(12) =3711a(13) =4174a(14) =4761a(15) =4771a(16) =6761a(17) =7165a(18) =7174a(19) =7261a(20) =7331a(21) =11275a(22) =11474a(23) =11475a(24) =11711a(25) =11715a(26) =11716a(27) =11724a(28) =11725a(29) =11731
External references
- oeis: A257210