Class numbers h(D) of imaginary quadratic orders with discriminant D == 0 or 1 mod 4, D<0.

Terms

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