a(1) = 11; for n > 1, palindromic primes in which a single digit is sandwiched between strings of '1's.
A088281
a(1) = 11; for n > 1, palindromic primes in which a single digit is sandwiched between strings of '1's.
Terms
- a(0) =11a(1) =101a(2) =131a(3) =151a(4) =181a(5) =191a(6) =11311a(7) =11411a(8) =1114111a(9) =1117111a(10) =111181111a(11) =111191111
External references
- oeis: A088281