State assignments for n-state machine.

Terms

a(0) =2a(1) =12a(2) =12a(3) =1120a(4) =3360a(5) =6720a(6) =6720a(7) =172972800a(8) =1210809600a(9) =7264857600a(10) =36324288000a(11) =145297152000a(12) =435891456000a(13) =871782912000a(14) =871782912000