31311113

Properties

Appears in sequences

• a(1)=1; otherwise, find the first digit from the left in a(n-1) which is 1, 3, 7 or 9. Omitting the digits before this one, we reverse the remaining digits, obtaining s, say. Then a(n) is the smallest prime which ends with s and has not already appeared.at n=15A249974
• Emirps containing only the digits 1 and 3.at n=27A335787
• Prime numbersat n=1933963