OFFSET

1,2

COMMENTS

The standard definition of a ring requires that multiplication be associative, so these are very nonstandard rings.

The rings need not contain a multiplicative unit.

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.

This sequence may be multiplicative. - Mitch Harris, Apr 19 2005

CROSSREFS

KEYWORD

nonn,more

AUTHOR

Christian G. Bower, Jun 15 1998

STATUS

approved