A141124 - OEIS

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A141124

Hankel transform of a transform of Jacobsthal numbers.

1, 5, -9, -9, 17, 13, -25, -17, 33, 21, -41, -25, 49, 29, -57, -33, 65, 37, -73, -41, 81, 45, -89, -49, 97, 53, -105, -57, 113, 61, -121, -65, 129, 69, -137, -73, 145, 77, -153, -81, 161, 85, -169, -89, 177, 93, -185, -97, 193, 101, -201 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`Hankel transform of A100096(n+1).`
	FORMULA	`G.f.: (1+5x-7x^2+x^3)/(1+2x^2+x^4); a(n)=(4n+1)cos(pin/2)+(2n+3)sin(pin/2);`
	CROSSREFS	`Sequence in context: A127500 A057655 A175374 * A046255 A068388 A205712` `Adjacent sequences: A141121 A141122 A141123 * A141125 A141126 A141127`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jun 05 2008`

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Last modified February 15 20:26 EST 2012. Contains 205852 sequences.