Number of degree-n permutations of order exactly 5.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =24a(6) =144a(7) =504a(8) =1344a(9) =3024a(10) =78624a(11) =809424a(12) =4809024a(13) =20787624a(14) =72696624a(15) =1961583624a(16) =28478346624a(17) =238536558624