Number of degree-n permutations of order exactly 7.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =720a(7) =5760a(8) =25920a(9) =86400a(10) =237600a(11) =570240a(12) =1235520a(13) =892045440a(14) =13348249200a(15) =106757164800a(16) =604924594560