%I A003223 M1226
%S A003223 1,2,4,10,28,130
%N A003223 Superpositions of cycles.
%D A003223 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A003223 F. Harary and E. M. Palmer, Graphical Enumeration, Academic Press, NY, 
               1973, p. 171.
%D A003223 E. M. Palmer and R. W. Robinson, Enumeration under two representations 
               of the wreath product, Acta Math., 131 (1973), 123-143.
%Y A003223 Cf. A003224, A003225.
%Y A003223 Sequence in context: A022492 A123429 A006841 this_sequence A061417 A153921 
               A060315
%Y A003223 Adjacent sequences: A003220 A003221 A003222 this_sequence A003224 A003225 
               A003226
%K A003223 nonn,easy,more
%O A003223 3,2
%A A003223 N. J. A. Sloane (njas(AT)research.att.com).