Number of 3 X 3 matrices whose determinant is 1 mod n.

Terms

a(0) =1a(1) =168a(2) =5616a(3) =43008a(4) =372000a(5) =943488a(6) =5630688a(7) =11010048a(8) =36846576a(9) =62496000a(10) =212427600a(11) =241532928a(12) =810534816a(13) =945955584a(14) =2089152000a(15) =2818572288a(16) =6950204928a(17) =6190224768a(18) =16934047920a(19) =15998976000a(20) =31621943808a(21) =35687836800