Nonprime numbers k >= 1 such that k and phi(k) contain only digits 0 and 1.
A203897
Nonprime numbers k >= 1 such that k and phi(k) contain only digits 0 and 1.
Terms
- a(0) =1a(1) =1111a(2) =110111111a(3) =1111011011a(4) =11000111111a(5) =110011011011a(6) =110111101111a(7) =111100011011a(8) =111101010101a(9) =111101111011
External references
- oeis: A203897