A078001 - OEIS

This site is supported by donations to The OEIS Foundation.

A078001

Expansion of (1-x)/(1-2*x+x^2+x^3).

1, 1, 1, 0, -2, -5, -8, -9, -5, 7, 28, 54, 73, 64, 1, -135, -335, -536, -602, -333, 472, 1879, 3619, 4887, 4276, 46, -9071, -22464, -35903, -40271, -22175, 31824, 126094, 242539, 327160, 285687, 1675, -609497, -1506356, -2404890, -2693927, -1476608, 2145601, 8461737, 16254481, 21901624 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	FORMULA	`a(n) = Sum_{k=0..floor(n/3)} (-1)^kbinomial(n-k, 2k). - Vladeta Jovovic (vladeta(AT)eunet.rs), Feb 10 2003`
	CROSSREFS	`Cf. A005251, A077856.` `Sequence in context: A011279 A185094 A071099 * A072955 A153129 A076871` `Adjacent sequences: A077998 A077999 A078000 * A078002 A078003 A078004`
	KEYWORD	`sign`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Nov 17 2002`

Content is available under The OEIS End-User License Agreement .

Last modified February 15 06:58 EST 2012. Contains 205694 sequences.