Numbers k with the property that k followed by k 7's is prime.
A133127
Numbers k with the property that k followed by k 7's is prime.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =32a(4) =122a(5) =388a(6) =1580a(7) =2302a(8) =3436a(9) =3866a(10) =16993a(11) =35263a(12) =42601a(13) =51251
External references
- oeis: A133127