Sum of the orders of the elements in the group GL(2,Z_n).

Terms

a(0) =1a(1) =13a(2) =219a(3) =367a(4) =4891a(5) =1977a(6) =36085a(7) =9791a(8) =46731a(9) =39133a(10) =479157a(11) =37119a(12) =1289911a(13) =243703a(14) =375219a(15) =305599a(16) =6991319a(17) =299913a(18) =11500123a(19) =667219a(20) =2610657a(21) =3723423a(22) =40035651a(23) =781127a(24) =14928331a(25) =8544673a(26) =11297307a(27) =4540153a(28) =129539703a(29) =2739477