A010720 - OEIS

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A010720

Period 2: repeat (5,9).

5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5, 9, 5 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	LINKS	`Index to sequences with linear recurrences with constant coefficients, signature (0,1).`
	FORMULA	`a(n)=-2(-1)^n+7 a(n)=9(n mod 2)+5[(n+1) mod 2] - Paolo P. Lava (paoloplava(AT)gmail.com), Oct 20 2006` `a(n) = a(n-2) for n > 1; a(0) = 5, a(1) = 9. G.f.: (5+9x)/((1-x)*(1+x)). [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 01 2010]`
	CROSSREFS	`Sequence in context: A197693 A117014 A200283 * A094389 A057821 A133742` `Adjacent sequences: A010717 A010718 A010719 * A010721 A010722 A010723`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 15 13:57 EST 2012. Contains 205810 sequences.