id:A128498 - OEIS Search Results

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Fourth column (m=3) of triangle A128494.

+0
3

1, 1, -3, -3, 7, 7, -13, -13, 22, 22, -34, -34, 50, 50, -70, -70, 95, 95, -125, -125, 161, 161, -203, -203, 252, 252, -308, -308, 372, 372, -444, -444, 525, 525, -615, -615, 715, 715, -825, -825, 946, 946, -1078, -1078, 1222, 1222, -1378, -1378, 1547, 1547, -1729, -1729, 1925, 1925, -2135, -2135 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Unsigned, this is the repeated sequence A002623.`
	FORMULA	`G.f.: 1/((1-x)(1+x^2)^4).` `a(2k)= a(2k+1)= ((-1)^k)A002623(n), k>=0.`
	CROSSREFS	`Cf. A008642 (unsigned column m=2). A128499 (column m=4).` `Adjacent sequences: A128495 A128496 A128497 this_sequence A128499 A128500 A128501` `Sequence in context: A128508 A083743 A126990 this_sequence A086530 A052551 A070925`
	KEYWORD	`sign,easy`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Apr 04 2007`

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.

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