Number of genera of Q(sqrt(-n)), n squarefree.

Terms

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