A016211 - OEIS

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A016211

Expansion of 1/((1-x)(1-3x)(1-6x)).

1, 10, 73, 478, 2989, 18298, 110881, 668566, 4021237, 24156946, 145030249, 870447214, 5223480445, 31343274154, 188066819377, 1128422439622, 6770599207813, 40623788957122, 243743314873465 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`Index to sequences with linear recurrences with constant coefficients, signature (10,-27,18).`
	FORMULA	`a(n)=9a(n-1)-18a(n-2)+1. - Vincenzo Librandi, Feb 10 2011` `a(n) = 2*6^(n+1)/5 -3^(n+1)/2+1/10. - R. J. Mathar, Feb 10 2011`
	MAPLE	`a:=n->sum((6^(n-j)-3^(n-j))/3, j=0..n): seq(a(n), n=1..19); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 15 2007`
	CROSSREFS	`Sequence in context: A181402 A003366 A161743 * A055424 A200580 A181678` `Adjacent sequences: A016208 A016209 A016210 * A016212 A016213 A016214`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 17 06:25 EST 2012. Contains 205995 sequences.