Triangle read by rows: T(n,k) = numerator of P(n, k) = 1 - n!/(n^k*(n-k)!).

Terms

a(0) =1a(1) =1a(2) =7a(3) =1a(4) =5a(5) =29a(6) =1a(7) =13a(8) =101a(9) =601a(10) =1a(11) =4a(12) =13a(13) =49a(14) =319a(15) =1a(16) =19a(17) =223a(18) =2041a(19) =16087a(20) =116929a(21) =1a(22) =11a(23) =151a(24) =407a(25) =3781a(26) =16069a(27) =130757a(28) =1a(29) =25