id:A086699 - OEIS Search Results

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

+0
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1, 9, 294, 37800, 19373760, 39687459840, 325139829719040, 10654345790226432000, 1396491759480328106803200, 732164571206732295657278668800, 1535460761275478347250381697633484800 (list; graph; listen)

	OFFSET	`1,2`
	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.` `Adjacent sequences: A086696 A086697 A086698 this_sequence A086700 A086701 A086702` `Sequence in context: A078326 A055792 A053935 this_sequence A027834 A129934 A003303`
	KEYWORD	`nonn`
	AUTHOR	`Yuval Dekel (dekelyuval(AT)hotmail.com), Jul 28 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Mar 28 2005`

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.

AT&T Labs Research