%I A002862 M1403 N0547
%S A002862 0,1,2,5,11,31,77,214,576,1592,4375,12183,33864,94741,265461,746372,
%T A002862 2102692,5938630,16803610,47639902,135288198,384812502,1096141974,
%U A002862 3126648842,8929715592,25533447030
%N A002862 Number of nonisomorphic connected functions with no fixed points, or 
               proper rings with n edges.
%D A002862 R. A. Fisher, Contributions to Mathematical Statistics, Wiley, 1950, 
               41.399.
%D A002862 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A002862 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%Y A002862 (A002861) minus (A000081).
%Y A002862 Sequence in context: A139466 A139467 A124481 this_sequence A139464 A101837 
               A124483
%Y A002862 Adjacent sequences: A002859 A002860 A002861 this_sequence A002863 A002864 
               A002865
%K A002862 nonn,nice
%O A002862 1,3
%A A002862 N. J. A. Sloane (njas(AT)research.att.com).
%E A002862 More terms from and better description from Christian Bower (bowerc(AT)usa.net)