Primes of the form a string of identical digits preceded by a 2.
A090150
Primes of the form a string of identical digits preceded by a 2.
Terms
- a(0) =2a(1) =23a(2) =29a(3) =211a(4) =233a(5) =277a(6) =2111a(7) =2333a(8) =2777a(9) =2999a(10) =23333a(11) =2999999a(12) =29999999a(13) =2777777777a(14) =23333333333
External references
- oeis: A090150