Class numbers of quadratic fields.

Terms

a(0) =3a(1) =7a(2) =19a(3) =25a(4) =51a(5) =109a(6) =153a(7) =213a(8) =289a(9) =1121a(10) =1121a(11) =1121a(12) =3997a(13) =7457a(14) =12017a(15) =12719a(16) =20299a(17) =24503a(18) =24503a(19) =25817a(20) =25817a(21) =128755a(22) =128755a(23) =219207a(24) =456929a(25) =456929a(26) =761619a(27) =883537