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) = 7 for i<>j, or 0 if no such prime exists.
A241027
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) = 7 for i<>j, or 0 if no such prime exists.
Terms
- a(0) =17a(1) =0a(2) =1777a(3) =71777a(4) =0a(5) =0a(6) =77777177a(7) =0a(8) =1777777777a(9) =71777777777a(10) =0a(13) =0a(15) =0a(16) =0a(19) =0a(22) =0
External references
- oeis: A241027