Class number of forms with discriminant -A003657(n), or equivalently class number of imaginary quadratic field with discriminant -A003657(n).
A006641
Class number of forms with discriminant -A003657(n), or equivalently class number of imaginary quadratic field with discriminant -A003657(n).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =1a(7) =2a(8) =3a(9) =2a(10) =3a(11) =2a(12) =4a(13) =2a(14) =1a(15) =5a(16) =2a(17) =2a(18) =4a(19) =4a(20) =3a(21) =1a(22) =4a(23) =7a(24) =5a(25) =3a(26) =4a(27) =6a(28) =2a(29) =2
External references
- oeis: A006641