id:A075691 - OEIS Search Results

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Let M(k) be the kxk matrix m_(i,j) = i (modj) - j (modi); then a(n)=det(M(2*n)).

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1, 1, 81, 81, 53361, 57744801, 119836809, 3231369355201, 3030985307728225, 1788629609520903241, 6271587203171610961, 566023524795406585035241, 135075661787247287434787209, 202466242679530681259970248569 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Terms are squares. det(M(2*n+1))=0.`
	PROGRAM	`(PARI) a(n)=matdet(matrix(2n, 2n, i, j, i%j-j%i))`
	CROSSREFS	`Sequence in context: A033401 A087410 A090292 this_sequence A055390 A089784 A124968` `Adjacent sequences: A075688 A075689 A075690 this_sequence A075692 A075693 A075694`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 12 2002`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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