id:A105524 - OEIS Search Results

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Diagonal sums of number triangle A105522.

+0
2

1, -2, 2, 0, -1, -2, 4, 4, -10, -12, 30, 36, -93, -114, 300, 372, -994, -1244, 3364, 4240, -11578, -14676, 40400, 51448, -142592, -182288, 508166, 651756, -1826037, -2348562, 6608844, 8520564, -24069258, -31097388, 88145436, 114096096, -324391422, -420590652, 1199074584 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: ((1+2x)sqrt(1+4x^2)-4x^2-2x-1)/(sqrt(1+4x^2)-3)`
	CROSSREFS	`Adjacent sequences: A105521 A105522 A105523 this_sequence A105525 A105526 A105527` `Sequence in context: A079070 A096994 A035370 this_sequence A000209 A104245 A109754`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 13 2005`

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Last modified May 11 10:28 EDT 2008. Contains 139662 sequences.

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