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%I #15 Dec 05 2014 04:27:38
%S 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 2
%N Number of self-converse rings (isomorphic to inverse) with n elements.
%H A. V. Lelechenko, <a href="http://arxiv.org/abs/1305.1639">Parity of the number of primes in a given interval and algorithms of the sublinear summation</a>, arXiv:1305.1639 [math.NT], 2013.
%H Christof Noebauer, <a href="https://web.archive.org/web/20070613192932/http://www.algebra.uni-linz.ac.at/~noebsi/">Home page</a>
%Y Cf. A027623, A037289.
%K nonn,hard,mult,nice
%O 1,2
%A _Christian G. Bower_, Jun 15 1998
%E a(16) and a(27) from Christof Noebauer (christof.noebauer(AT)algebra.uni-linz.ac.at), Oct 17 2000
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