Number of equivalence classes of cycles (or periods) of reduced indefinite binary quadratic forms of determinant -n (see comments).
A006375
Number of equivalence classes of cycles (or periods) of reduced indefinite binary quadratic forms of determinant -n (see comments).
Terms
- a(0) =2a(1) =1a(2) =1a(3) =3a(4) =2a(5) =1a(6) =1a(7) =2a(8) =4a(9) =2a(10) =1a(11) =2a(12) =2a(13) =1a(14) =2a(15) =5a(16) =2a(17) =2a(18) =1a(19) =3a(20) =2a(21) =1a(22) =1a(23) =3a(24) =6a(25) =2a(26) =2a(27) =2a(28) =2a(29) =2
External references
- oeis: A006375