id:A138268 - OEIS Search Results

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Negative of the Hankel transform of C(n)-C(n+2), where C(n)=A000108(n).

+0
2

1, 4, -17, 17, 72, -305, 305, 1292, -5473, 5473, 23184, -98209, 98209, 416020, -1762289, 1762289, 7465176, -31622993, 31622993, 133957148, -567451585, 567451585, 2403763488, -10182505537, 10182505537 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`-a(n) is the Hankel transform of C(n)-C(n+2).`
	FORMULA	`G.f.: (1+7x+3x^2+x^3)/(1+3x+8x^2+3x^3+x^4); a(n)=(Fibonacci(3floor((2n+5)/3))/Fibonacci(3))(4sin(2pi*n/3+pi/6)/3+1/3);`
	CROSSREFS	`Cf. A001076.` `Sequence in context: A063625 A057596 A070712 this_sequence A031444 A031033 A128981` `Adjacent sequences: A138265 A138266 A138267 this_sequence A138269 A138270 A138271`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Mar 10 2008`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

AT&T Labs Research