Number of permutations tau of {1,...,n} with tau(n) = n such that p = tau(1)^(tau(2)-1) + ... + tau(n-1)^(tau(n)-1) + tau(n)^(tau(1)-1), and p - 2 and p + 6 are all prime.
A342966
Number of permutations tau of {1,...,n} with tau(n) = n such that p = tau(1)^(tau(2)-1) + ... + tau(n-1)^(tau(n)-1) + tau(n)^(tau(1)-1), and p - 2 and p + 6 are all prime.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =10a(7) =55a(8) =199a(9) =1915a(10) =13679a(11) =86296
External references
- oeis: A342966