%I #9 Feb 28 2019 11:21:57
%S 1,2,2,55,2,4,2,801288,165,4,2,110,2,4,4
%N Number of nonassociative rings with n elements.
%C The standard definition of a ring requires that multiplication be associative, so these are very nonstandard rings.
%C The rings need not contain a multiplicative unit.
%C In fact more is known: 1,2,2,55,2,4,2,801288,165,4,2,110,2,4,4,?,2,330,2,110,4,4,2,1602576.
%C This sequence may be multiplicative. - _Mitch Harris_, Apr 19 2005
%Y Cf. A027623.
%K nonn,more
%O 1,2
%A _Christian G. Bower_, Jun 15 1998