A124746 - OEIS

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A124746

Expansion of (1+x^2)/(1-x^4+x^5).

1, 0, 1, 0, 1, -1, 1, -1, 1, -2, 2, -2, 2, -3, 4, -4, 4, -5, 7, -8, 8, -9, 12, -15, 16, -17, 21, -27, 31, -33, 38, -48, 58, -64, 71, -86, 106, -122, 135, -157, 192, -228, 257, -292, 349, -420, 485, -549, 641, -769, 905, -1034, 1190, -1410, 1674 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,10`
	COMMENTS	`Diagonal sums of A124744.`
	FORMULA	`a(n)=sum{k=0..floor(n/2), C(floor(k/2),n-2k)*(-1)^n}`
	CROSSREFS	`Sequence in context: A001156 A199119 A035451 * A124789 A103372 A029082` `Adjacent sequences: A124743 A124744 A124745 * A124747 A124748 A124749`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Nov 06 2006`

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Last modified February 17 16:49 EST 2012. Contains 206058 sequences.