Numbers k such that (the concatenation of the first k positive even numbers) + 1 is prime.
A387245
Numbers k such that (the concatenation of the first k positive even numbers) + 1 is prime.
Terms
- a(0) =1a(1) =5a(2) =9a(3) =24a(4) =1400a(5) =8915
External references
- oeis: A387245