Number of cyclic Latin squares of order n.

Terms

a(0) =1a(1) =2a(2) =12a(3) =48a(4) =480a(5) =1440a(6) =30240a(7) =161280a(8) =2177280a(9) =14515200a(10) =399168000a(11) =1916006400a(12) =74724249600a(13) =523069747200