Copies of 3 and 7 alternately such that every partial concatenation is a prime.
A110778
Copies of 3 and 7 alternately such that every partial concatenation is a prime.
Terms
- a(0) =3a(1) =7a(2) =3a(3) =777a(4) =333a(6) =3333333a(8) =33333
External references
- oeis: A110778