A037290 - OEIS

This site is supported by donations to The OEIS Foundation.

A037290

Number of self-converse rings (isomorphic to inverse) with n elements.

1, 2, 2, 9, 2, 4, 2, 40, 9, 4, 2, 18, 2, 4, 4, 242, 2, 18, 2, 18, 4, 4, 2, 80, 9, 4, 47, 18, 2, 8, 2 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`Christof Noebauer, Home page [broken link]`
	CROSSREFS	`Cf. A027623, A037289.` `Sequence in context: A082838 A074961 A037289 * A155936 A167594 A108462` `Adjacent sequences: A037287 A037288 A037289 * A037291 A037292 A037293`
	KEYWORD	`nonn,hard,mult,nice`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Jun 15 1998.`
	EXTENSIONS	`a(16) and a(27) from Christof Noebauer (christof.noebauer(AT)algebra.uni-linz.ac.at), Oct 17, 2000.`

Content is available under The OEIS End-User License Agreement .

Last modified February 15 23:53 EST 2012. Contains 205860 sequences.