A100285 - OEIS

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A100285

Expansion of (1+5x^2)/(1-x+x^2-x^3).

1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1, 5, 5, 1, 1 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,3`
	COMMENTS	`This sequence is periodic. - T. D. Noe, Nov 09 2006`
	LINKS	`Table of n, a(n) for n=0..89.`
	FORMULA	`a(n)=a(n-1)-a(n-2)+a(n-3); a(n)=3-2cos(pin/2)-2sin(pin/2); a(n)=mod(A100284(n), 8).` `a(n)=1/2{3(n mod 4)+[(n+1) mod 4]-[(n+2) mod 4]+[(n+3) mod 4]} - Paolo P. Lava, Nov 21 2006`
	CROSSREFS	`Sequence in context: A046585 A046584 A046599 * A172355 A178916 A046568` `Adjacent sequences: A100282 A100283 A100284 * A100286 A100287 A100288`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry, Nov 11 2004`
	EXTENSIONS	`Corrected by T. D. Noe, Nov 09 2006`
	STATUS	`approved`

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Last modified May 20 16:17 EDT 2013. Contains 225463 sequences.