A166445 - OEIS

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A166445

Hankel transform of A025276.

1, 0, -1, 1, 3, 0, -3, 1, 5, 0, -5, 1, 7, 0, -7, 1, 9, 0, -9, 1, 11, 0, -11, 1, 13, 0, -13, 1, 15, 0, -15, 1, 17, 0, -17, 1, 19, 0, -19, 1, 21, 0, -21, 1, 23, 0, -23, 1, 25, 0, -25 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	LINKS	`Index to sequences with linear recurrences with constant coefficients, signature (1,-2,2,-1,1).`
	FORMULA	`G.f.: (1-x+x^2+x^4)/((1-x)(1+x^2)^2).`
	CROSSREFS	`Sequence in context: A138123 A127372 A051171 * A085919 A105824 A171911` `Adjacent sequences: A166442 A166443 A166444 * A166446 A166447 A166448`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 13 2009`

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.