A000827 - OEIS

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A000827

Number of switching networks (see Harrison reference for precise definition).
(Formerly M5101 N2209)

20, 484, 497760, 1957701217328, 110039180295740617586514688, 1453032809117364647244136820047121806179196309892169728 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`Symmetric group of n variables operating on the domain and symmetric group of 3 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: A049382 A065412 A159753 * A118552 A092087 A008270` `Adjacent sequences: A000824 A000825 A000826 * A000828 A000829 A000830`
	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 14 11:36 EST 2012. Contains 205623 sequences.