Class numbers of the real quadratic fields Q(sqrt(A005473(n))).

Terms

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