id:A112030 - OEIS Search Results

Search: id:A112030

Displaying 1-1 of 1 results found.

page 1

A112030

(2 + (-1)^n) * (-1)^floor(n/2).

+0
8

3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1, -3, -1, 3, 1 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`a(n) = A010684(n+1) * (-1)^floor(n/2);` `the fractions A112031(n)/A112032(n) give the partial sums of a(n)/floor((n+4)/2).`
	FORMULA	`O.g.f.: (3+x)/(1+x^2) . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 09 2008`
	CROSSREFS	`Cf. A016116, A112033.` `Sequence in context: A066056 A153284 A010684 this_sequence A125768 A111742 A104740` `Adjacent sequences: A112027 A112028 A112029 this_sequence A112031 A112032 A112033`
	KEYWORD	`sign`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 27 2005`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research