A076021 - OEIS

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A076021

Number of fully idempotent systems with n elements having with one binary operation satisfying the equation B(AB)=A (semisymmetric quasigroups).

1, 0, 1, 1, 0, 0, 4, 0, 20 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,7`
	LINKS	`Table of n, a(n) for n=1..9.`
	CROSSREFS	`Cf. A076016-A076020.` `Sequence in context: A058348 A184946 A085618 * A199933 A078630 A178671` `Adjacent sequences: A076018 A076019 A076020 * A076022 A076023 A076024`
	KEYWORD	`nonn,changed`
	AUTHOR	`Richard Schroeppel , Oct 29 2002`
	STATUS	`approved`

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Last modified May 25 12:01 EDT 2013. Contains 225647 sequences.