id:A097140 - OEIS Search Results

Search: id:A097140

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Interleave n and 1-n.

+0
3

0, 1, 1, 0, 2, -1, 3, -2, 4, -3, 5, -4, 6, -5, 7, -6, 8, -7, 9, -8, 10, -9, 11, -10, 12, -11, 13, -12, 14, -13, 15, -14, 16, -15, 17, -16, 18, -17, 19, -18, 20, -19, 21, -20, 22, -21, 23, -22, 24, -23, 25, -24, 26, -25, 27, -26, 28, -27, 29, -28, 30, -29, 31, -30, 32, -31 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Partial sums are A097141. Binomial transform is x(1+x)/(1-2x), or A003945 with a leading 0.`
	FORMULA	`G.f. : x(1+2x)/((1-x)(1+x)^2); a(n)=3/4+(2n-3)(-1)^n/4.`
	CROSSREFS	`Sequence in context: A124876 A026238 A066136 this_sequence A028242 A030451 A029162` `Adjacent sequences: A097137 A097138 A097139 this_sequence A097141 A097142 A097143`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 29 2004`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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