cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A079176 Number of non-anti-associative closed binary operations on a set of order n.

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%I A079176 #10 Sep 03 2024 04:27:02
%S A079176 1,14,19631,4294545736
%N A079176 Number of non-anti-associative closed binary operations on a set of order n.
%C A079176 Each a(n) is equal to the sum of the products of each element in row n of A079178 and the corresponding element of A079210.
%H A079176 C. van den Bosch, <a href="http://cosmos.ucc.ie/~cjvdb1/html/binops.shtml">Closed binary operations on small sets</a>
%H A079176 <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a>
%F A079176 a(n) = A002489(n) - A079179(n).
%Y A079176 Cf. A079177, A079178, A079179.
%K A079176 nonn
%O A079176 1,2
%A A079176 Christian van den Bosch (cjb(AT)cjb.ie), Jan 03 2003