Class number of quadratic field with discriminant -4n+1.

Terms

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