A097948 - OEIS

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A097948

G.f.: -(1-3*x^2-x^3)/(1+4*x-4*x^3-x^4).

-1, 4, -13, 49, -181, 676, -2521, 9409, -35113, 131044, -489061, 1825201, -6811741, 25421764, -94875313, 354079489, -1321442641, 4931691076, -18405321661, 68689595569, -256353060613, 956722646884, -3570537526921, 13325427460801, -49731172316281, 185599261804324 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`This is the sequence tesseq(X) with X = .5'i + .5i' + 'ii' - .5'jj' + 1.5'kk' - 1. See A108946.`
	LINKS	`Robert Munafo, Sequences Related to Floretions` `Index entries for sequences related to linear recurrences with constant coefficients`
	CROSSREFS	`Cf. A001353, A097947, A097949, A108946.` `Sequence in context: A149449 A149450 A180007 * A096971 A149451 A149452` `Adjacent sequences: A097945 A097946 A097947 * A097949 A097950 A097951`
	KEYWORD	`sign`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), following a suggestion of Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Sep 06 2004`
	EXTENSIONS	`Edited by Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Dec 11 2009`

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Last modified February 18 00:14 EST 2012. Contains 206085 sequences.