Copies of 7 and 1 alternately such that every partial concatenation is a prime.
A110788
Copies of 7 and 1 alternately such that every partial concatenation is a prime.
Terms
- a(0) =7a(1) =1a(2) =77a(3) =1111a(4) =77777a(5) =1111111111
External references
- oeis: A110788