The number of integers k < 10^n such that both k and k^3 mod 10^n have all odd decimal digits.
A182211
The number of integers k < 10^n such that both k and k^3 mod 10^n have all odd decimal digits.
Terms
- a(0) =5a(1) =25a(2) =62a(3) =151a(4) =381a(5) =833a(6) =2163a(7) =5291a(8) =13317a(9) =33519a(10) =85179a(11) =213083a(12) =539212a(13) =1344272a(14) =3358571
External references
- oeis: A182211