Primes p such that p^2 is the concatenation of x and 2*x+1 for some x.
A355970
Primes p such that p^2 is the concatenation of x and 2*x+1 for some x.
Terms
- a(0) =5a(1) =7a(2) =67a(3) =28573a(4) =666667a(5) =31578949a(6) =64912283a(7) =66666667a(8) =666666667a(9) =66666666667
External references
- oeis: A355970