Search: id:A079205
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%I A079205
%S A079205 0,2,0,0,2,0,0,0,0,2,0,29,0,237,4374
%N A079205 Number of isomorphism classes of non-associative non-commutative anti-associative 
               anti-commutative closed binary operations on a set of order n, listed 
               by class size.
%C A079205 A079202(n)+A079203(n)+A079204(n)+A079205(n)+A079197(n)+A079207(n)+A079208(n)+A079209(n)+A063524(n)=A079171(n)\
               
%C A079205 Elements per row: 1,2,4,8,16,30,... (given by A027423, number of positive 
               divisors of n!)
%C A079205 First four rows: 0; 2,0; 0,2,0,0; 0,0,2,0,29,0,237,4374
%C A079205 A079236(x) is equal to the sum of the products of each element in row 
               x of this sequence and the corresponding element of A079210.
%C A079205 The sum of each row x of this sequence is given by A079237(x).
%H A079205 C. van den Bosch, <a href="http://cosmos.ucc.ie/~cjvdb1/html/binops.shtml">
               Closed binary operations on small sets</a>
%H A079205 <a href="Sindx_Gre.html#groupoids">Index entries for sequences related 
               to groupoids</a>
%Y A079205 Cf. A079202, A079203, A079204, A079197, A079207, A079208, A079209, A079236, 
               A079237.
%Y A079205 Sequence in context: A033723 A138811 A107494 this_sequence A107497 A000095 
               A034949
%Y A079205 Adjacent sequences: A079202 A079203 A079204 this_sequence A079206 A079207 
               A079208
%K A079205 nonn,tabf
%O A079205 1,2
%A A079205 Christian van den Bosch (cjb(AT)cjb.ie), Jan 03 2003

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