A199680 - OEIS

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A199680

(11*9^n+1)/2.

6, 50, 446, 4010, 36086, 324770, 2922926, 26306330, 236756966, 2130812690, 19177314206, 172595827850, 1553362450646, 13980262055810, 125822358502286, 1132401226520570, 10191611038685126, 91724499348166130, 825520494133495166 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,1`
	LINKS	`Vincenzo Librandi, Table of n, a(n) for n = 0..1000` `Index to sequences with linear recurrences with constant coefficients, signature (10,-9).`
	FORMULA	`a(n) = 9a(n-1)-4.` `a(n) = 10a(n-1)-9a(n-2).` `G.f.: 2(3-5x)/((1-x)(1-9*x)).`
	PROG	`(MAGMA) [(11*9^n+1)/2: n in [0..30]];`
	CROSSREFS	`Sequence in context: A090409 A212233 A180910 * A039742 A125558 A005416` `Adjacent sequences: A199677 A199678 A199679 * A199681 A199682 A199683`
	KEYWORD	`nonn,easy`
	AUTHOR	`Vincenzo Librandi, Nov 09 2011`
	STATUS	`approved`

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Last modified June 20 00:11 EDT 2013. Contains 226416 sequences.