Smallest n-digit prime whose external digits as well as internal digits form a prime, or 0 if no such number exists.

A077361

Smallest n-digit prime whose external digits as well as internal digits form a prime, or 0 if no such number exists.

Terms

    a(0) =0a(1) =0a(2) =127a(3) =1021a(4) =10037a(5) =100057a(6) =1000033a(7) =10000079a(8) =100000037a(9) =1000000021a(10) =10000000033a(11) =100000000057

External references