Number of orthogonal 3 X 3 matrices over the ring Z/nZ.

Terms

a(0) =1a(1) =6a(2) =48a(3) =384a(4) =240a(5) =288a(6) =672a(7) =6144a(8) =1296a(9) =1440a(10) =2640a(11) =18432a(12) =4368a(13) =4032a(14) =11520a(15) =49152a(16) =9792a(17) =7776a(18) =13680a(19) =92160a(20) =32256a(21) =15840a(22) =24288a(23) =294912a(24) =30000a(25) =26208a(26) =34992a(27) =258048a(28) =48720a(29) =69120