A138382 - OEIS

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A138382

First differences of A138380. Second differences of A138377.

1, -3, -1, -2, -4, 12, 4, 8, 16, -48, -16, -32, -64, 192, 64, 128, 256, -768, -256, -512, -1024 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`a(n)=-4a(n-4).`
	CROSSREFS	`Sequence in context: A120577 A104695 A083275 * A123375 A021036 A080521` `Adjacent sequences: A138379 A138380 A138381 * A138383 A138384 A138385`
	KEYWORD	`sign`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), May 08 2008`
	EXTENSIONS	`Definition corrected by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 09 2008`

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Last modified February 14 04:19 EST 2012. Contains 205570 sequences.