A000826 - OEIS

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A000826

Number of switching networks (see Harrison reference for precise definition).
(Formerly M4731 N2023)

10, 88, 6616, 91666432, 76873231310808704, 236307200075982899871259747594698752, 11487310440209940035256956508459148560969989043872580978940882909553754112, 166267459448692920381622333807116147427859895760062485070882091322892520958706179582178218311954136674872641052328937320550635171107567787263574147072 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`Number of equivalence classes with symmetric group of n variables operating on the domain and symmetric group of 2 variables operating on the range. [Sean A. Irvine, Jul 11, 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	`Index entries for sequences related to switching networks`
	CROSSREFS	`Sequence in context: A125398 A165148 A163030 * A031416 A120923 A057081` `Adjacent sequences: A000823 A000824 A000825 * A000827 A000828 A000829`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Jul 10 2011`

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Last modified February 15 12:14 EST 2012. Contains 205783 sequences.