%I A003650 M0055
%S A003650 1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,2,1,1,1,1,2,1,1,1,1,1,1,4,1,1,1,2,1,1,1,
%T A003650 2,1,1,1,2,1,1,1,2,3,1,1,1,1,1,3,2,1,2,1,1,2,1,1,2,1,1,1,3,1,1,1,2,1,1,
%U A003650 2,2,1,2,1,2,1,1,1,5,1,1,1,1,2,1,1,4,1,1,1,1,2,3,3,2,2,1,2,1,1,4,1,1,1
%N A003650 Class number of real quadratic field with discriminant 4n+1.
%D A003650 D. A. Buell, Binary Quadratic Forms. Springer-Verlag, NY, 1989, pp. 224-241.
%D A003650 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%Y A003650 Cf. A003651.
%Y A003650 Sequence in context: A154843 A062557 A003649 this_sequence A059233 A143898 
               A101873
%Y A003650 Adjacent sequences: A003647 A003648 A003649 this_sequence A003651 A003652 
               A003653
%K A003650 nonn
%O A003650 1,12
%A A003650 N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein