Smallest prime numbers p of length n having a decimal expansion x(1)x(2)... x(n) such that there exists an index j where x(j) = 1 and x(i) = 9 for i<>j, or 0 if no such prime exists.
A241021
Smallest prime numbers p of length n having a decimal expansion x(1)x(2)... x(n) such that there exists an index j where x(j) = 1 and x(i) = 9 for i<>j, or 0 if no such prime exists.
Terms
- a(0) =19a(1) =199a(2) =1999a(3) =99991a(4) =199999a(5) =9999991a(6) =19999999a(7) =0a(8) =9199999999a(9) =99999199999a(10) =991999999999a(16) =0a(19) =0
External references
- oeis: A241021