Primes such that the outer 2 digits are n and n-1 and all inner digits are 7, where 0 < n < 9.
A108835
Primes such that the outer 2 digits are n and n-1 and all inner digits are 7, where 0 < n < 9.
Terms
- a(0) =271a(1) =877a(2) =2777771a(3) =8777777777
External references
- oeis: A108835