id:A099840 - OEIS Search Results

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Expansion of (1-6x)/(1-20x^2).

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1, -6, 20, -120, 400, -2400, 8000, -48000, 160000, -960000, 3200000, -19200000, 64000000, -384000000, 1280000000, -7680000000, 25600000000, -153600000000, 512000000000, -3072000000000, 10240000000000, -61440000000000, 204800000000000, -1228800000000000 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Fifth binomial transform of A099839.`
	FORMULA	`a(n)=(-2sqrt(5))^n(1/2+3sqrt(5)/10)+(2sqrt(5))^n(1/2-3sqrt(5)/10).`
	CROSSREFS	`Sequence in context: A036755 A045470 A117998 this_sequence A074012 A074013 A114959` `Adjacent sequences: A099837 A099838 A099839 this_sequence A099841 A099842 A099843`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 27 2004`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

AT&T Labs Research