id:A160569 - OEIS Search Results

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a(n)=9*(a(n-1)a(n-3)-a(n-2)^2)/a(n-4), a(1)=a(2)=a(3)=1, a(4)=-9.

+0
2

1, 1, 1, -9, -90, -1539, 51759, 7026831, 1349328699, -119669884380, -462804380329131, -818173230956710191, -775566981773559330471, 23349606875054800260574779, 383206716517298992863985977570 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`a(n+1) is the Hankel transform of A160568.`
	CROSSREFS	`Cf. A050512, A160566.` `Sequence in context: A049389 A127769 A062815 this_sequence A157545 A157558 A157584` `Adjacent sequences: A160566 A160567 A160568 this_sequence A160570 A160571 A160572`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), May 19 2009`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

AT&T Labs Research