id:A088922 - OEIS Search Results

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Consider the n X n matrix with entries (i*j mod n), where i,j=0..n-1; a(n) = rank of this matrix over the real numbers.

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0, 1, 2, 3, 3, 5, 4, 6, 6, 7, 6, 10, 7, 9, 10, 11, 9, 13, 10, 14, 13, 13, 12, 18, 14, 15, 16, 18, 15, 21, 16, 20, 19, 19, 20, 25, 19, 21, 22, 26, 21, 27, 22, 26, 27, 25, 24, 32, 26, 29 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`Conjecture: for every prime p>=3, a(p) = (p+1)/2.`
	CROSSREFS	`Sequence in context: A159070 A088241 A163126 this_sequence A143092 A143089 A161857` `Adjacent sequences: A088919 A088920 A088921 this_sequence A088923 A088924 A088925`
	KEYWORD	`nonn`
	AUTHOR	`Max Alekseyev (maxale(AT)gmail.com), Dec 01 2003`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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