id:A110315 - OEIS Search Results

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Diagonal sums of the Fibonacci related number triangle A110314.

+0
2

1, -1, -1, -2, -5, -3, -11, -4, -19, -5, -29, -6, -41, -7, -55, -8, -71, -9, -89, -10, -109, -11, -131, -12, -155, -13, -181, -14, -209, -15, -239, -16, -271, -17, -305, -18, -341, -19, -379, -20, -419, -21, -461, -22, -505, -23, -551, -24, -599, -25, -649 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`G.f.: (1-x-4x^2+x^3+x^4)/((1-x)^3*(1+x)^3); a(n)=3a(n-2)-3a(n-4)+a(n-6); a(n)=(6-n^2)(-1)^n/8-(n^2+4n-2)/8.`
	CROSSREFS	`Sequence in context: A097753 A120860 A091809 this_sequence A094744 A129198 A122442` `Adjacent sequences: A110312 A110313 A110314 this_sequence A110316 A110317 A110318`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 19 2005`

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

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