id:A058133 - OEIS Search Results

Search: id:A058133

Displaying 1-1 of 1 results found.

page 1

Monoids (semigroups with identity) of order n, considered to be equivalent when they are isomorphic or anti-isomorphic (by reversal of the operator).

+0
5

1, 2, 6, 27, 156, 1373, 17730 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Eric Postpischil Posting to sci.math newsgroup, May 21 1990` `Index entries for sequences related to monoids`
	CROSSREFS	`a(n)=(A058129(n)+A058132(n))/2.` `Sequence in context: A030858 A030932 A118192 this_sequence A009308 A032186 A122938` `Adjacent sequences: A058130 A058131 A058132 this_sequence A058134 A058135 A058136`
	KEYWORD	`nonn,more`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Nov 13 2000`

page 1

Search completed in 0.002 seconds

Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.