Number of O_1^{2+}(Z)-orbits of Lorentzian modular group.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =1a(6) =2a(7) =3a(8) =2a(9) =1a(10) =2a(11) =3a(12) =1a(13) =2a(14) =3a(15) =4a(16) =2a(17) =2a(18) =2a(19) =4a(20) =2a(21) =1a(22) =4a(23) =5a(24) =2a(25) =2a(26) =3a(27) =4a(28) =2a(29) =2