A000884 - OEIS

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A000884

Number of switching networks with C(2,n) acting on the domain and AG(3,2) acting on the domain.
(Formerly M1994 N0786)

2, 10, 2104, 13098898366, 1842172695541070949024622, 72975978136470898183217648961745628914523492408810350 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	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`
	FORMULA	`a(n)=(2242^(2^n)+424^(2^n)+8^(2^n)+4482^(n+2^(n-1))+922^(n+2^n+2^(n-1))+3842^n+` `1682^(n+2^n)-4482^(2^(n-1))-922^(2^n+2^(n-1)))/(1344*2^n) [Sean A. Irvine, Jan 24, 2012]`
	CROSSREFS	`Sequence in context: A171485 A057015 A059732 * A013557 A007158 A155733` `Adjacent sequences: A000881 A000882 A000883 * A000885 A000886 A000887`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Jan 23 2012`

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Last modified February 13 14:36 EST 2012. Contains 205512 sequences.