Class number of binary quadratic forms with fundamental discriminant A003658(n),n>=2.

Terms

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