A000844 - OEIS

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A000844

Number of switching networks (see Harrison reference for precise definition).
(Formerly M3559 N1441)

4, 19, 556, 2945786, 1201330980739424, 1846150007042109336331740689419264, 44872306407070078313805671235110493948692333391216774983943586135973888 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Number of equivalence classes with permutation and complementation of n variables on the domain and complementation of 2 variables on the range. [Sean A. Irvine, Aug 07 2011]`
	REFERENCES	`M. A. Harrison, On the number of classes of switching networks, J. Franklin Instit., 276 (1963), 313-327.` `N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).` `N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).`
	LINKS	`Table of n, a(n) for n=1..7.` `Index entries for sequences related to switching networks`
	CROSSREFS	`Sequence in context: A072879 A112958 A080991 * A000863 A023994 A002813` `Adjacent sequences: A000841 A000842 A000843 * A000845 A000846 A000847`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane.`
	EXTENSIONS	`More terms from Sean A. Irvine, Aug 07 2011`
	STATUS	`approved`

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Last modified June 19 23:19 EDT 2013. Contains 226416 sequences.