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.
%I A079242 #12 Jan 27 2022 15:42:14
%S A079242 0,0,2,2,8,2,122,2,1682
%N A079242 Number of associative non-commutative non-anti-associative anti-commutative closed binary operations on a set of order n.
%H A079242 <a href="/index/Se#semigroups">Index entries for sequences related to semigroups</a>
%F A079242 A079230(n) + A079232(n) + A079234(n) + A079236(n) + A079195(n) + A079240(n) + a(n) + A079244(n) + A063524(n) = A002489(n).
%F A079242 a(n) = Sum_{k>=1} A079208(n,k)*A079210(n,k).
%Y A079242 Cf. A079208, A079243 (isomorphism classes), A079230, A079232, A079234, A079236, A079195, A079240, A079244, A063524.
%K A079242 nonn,more
%O A079242 0,3
%A A079242 Christian van den Bosch (cjb(AT)cjb.ie), Jan 03 2003
%E A079242 a(0)=0 prepended and terms a(5)-a(8) added by _Andrew Howroyd_, Jan 27 2022