A086699 - OEIS

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A086699

Number of n X n matrices over GF(2) with rank n-1.

1, 9, 294, 37800, 19373760, 39687459840, 325139829719040, 10654345790226432000, 1396491759480328106803200, 732164571206732295657278668800, 1535460761275478347250381697633484800 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	LINKS	`Table of n, a(n) for n=1..11.`
	FORMULA	`for n>=2 : a(n) = product j=0...n-2 (2^n - 2^j)^2 / (2^(n-1)- 2^j).`
	CROSSREFS	`Cf. A002884, A060867.` `Sequence in context: A118893 A055792 A053935 * A027834 A175823 A129934` `Adjacent sequences: A086696 A086697 A086698 * A086700 A086701 A086702`
	KEYWORD	`nonn`
	AUTHOR	`Yuval Dekel (dekelyuval(AT)hotmail.com), Jul 28 2003`
	EXTENSIONS	`More terms from David Wasserman, Mar 28 2005`
	STATUS	`approved`

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Last modified May 26 02:46 EDT 2013. Contains 225653 sequences.