Order of the group of invertible 3 X 3 symmetric matrices over Z(n).

Terms

a(0) =1a(1) =28a(2) =468a(3) =1792a(4) =12400a(5) =13104a(6) =100548a(7) =114688a(8) =341172a(9) =347200a(10) =1609300a(11) =838656a(12) =4453488a(13) =2815344a(14) =5803200a(15) =7340032a(16) =22713088a(17) =9552816a(18) =44563284a(19) =22220800a(20) =47056464a(21) =45060400a(22) =141587908a(23) =53673984a(24) =193750000a(25) =124697664a(26) =248714388a(27) =180182016a(28) =574288624a(29) =162489600