%I A037290
%S A037290 1,2,2,9,2,4,2,40,9,4,2,18,2,4,4,242,2,18,2,18,4,4,2,80,9,4,47,18,2,8,
%T A037290 2
%N A037290 Number of self-converse rings (isomorphic to inverse) with n elements.
%H A037290 C. Noebauer, <a href="http://www.algebra.uni-linz.ac.at/~noebsi/">Home 
               page</a>
%Y A037290 Cf. A027623, A037289.
%Y A037290 Sequence in context: A082838 A074961 A037289 this_sequence A155936 A167594 
               A108462
%Y A037290 Adjacent sequences: A037287 A037288 A037289 this_sequence A037291 A037292 
               A037293
%K A037290 nonn,hard,mult,nice
%O A037290 1,2
%A A037290 Christian G. Bower (bowerc(AT)usa.net), Jun 15 1998.
%E A037290 a(16) and a(27) from Christof Noebauer (christof.noebauer(AT)algebra.uni-linz.ac.at), 
               Oct 17, 2000.