Least prime q satisfying q^p == 1 (mod 2p+1) and p^q == 1 (mod 2q+1), or 0 if otherwise, where p = prime(n).
A220295
Least prime q satisfying q^p == 1 (mod 2p+1) and p^q == 1 (mod 2q+1), or 0 if otherwise, where p = prime(n).
Terms
- a(0) =11a(1) =11a(2) =5a(3) =0a(4) =2a(5) =0a(6) =281a(7) =0a(8) =3a(9) =3a(10) =0a(11) =0a(12) =11a(13) =0a(14) =761a(15) =3a(16) =15233a(17) =0a(18) =0a(19) =2003a(20) =0a(21) =0a(22) =89a(23) =5a(24) =0a(25) =11369a(26) =0a(27) =431a(28) =0a(29) =3
External references
- oeis: A220295