Primes in which a string of 3's is sandwiched between two 1's.
A068645
Primes in which a string of 3's is sandwiched between two 1's.
Terms
- a(0) =11a(1) =131a(2) =13331a(3) =1333331
External references
- oeis: A068645
A068645
Primes in which a string of 3's is sandwiched between two 1's.