Number of permutations p of [n] such that 1*p(1) + 2*p(2) + 3*p(3) + ... + n*p(n) is prime.

A073114

Number of permutations p of [n] such that 1*p(1) + 2*p(2) + 3*p(3) + ... + n*p(n) is prime.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =4a(4) =7a(5) =22a(6) =160a(7) =938a(8) =7261a(9) =67492a(10) =572848a(11) =6774544a(12) =71929775a(13) =985400749a(14) =12521202682a(15) =188765264950

External references