Number of degree-n permutations of order dividing 7.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =721a(8) =5761a(9) =25921a(10) =86401a(11) =237601a(12) =570241a(13) =1235521a(14) =892045441a(15) =13348249201a(16) =106757164801a(17) =604924594561