id:A037290 - OEIS Search Results

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

+0
1

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; listen)

	OFFSET	`1,2`
	LINKS	`C. Noebauer, Home page`
	CROSSREFS	`Cf. A027623, A037289.` `Adjacent sequences: A037287 A037288 A037289 this_sequence A037291 A037292 A037293` `Sequence in context: A082838 A074961 A037289 this_sequence A108462 A011403 A113554`
	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.`

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Last modified November 9 12:23 EST 2009. Contains 166233 sequences.