id:A166114 - OEIS Search Results

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a(n)=(6-(-4)^n)/5.

+0
3

1, 2, -2, 14, -50, 206, -818, 3278, -13106, 52430, -209714, 838862, -4677718, 17388602, -70876678, 282184442, -1130060038, 4518917883, -18076993798, 72306652922, -289227933958, 1156910413562, -4627642976518, 18510570583802 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(0)= 1, a(1)= 2, a(n)= 4a(n-2)-3a(n-1) for n>1. a(n)= 6-4*a(n-1), a(0)=1 . a(n)= a(n-1)+(-4)^(n-1), a(0)=1 . G.f.: (1+5x)/(1+3x-4x^2). E.g.f.: (6exp(x)-exp(-4x))/5.`
	CROSSREFS	`Cf. A084222, A084247` `Sequence in context: A032038 A151353 A151437 this_sequence A009773 A006929 A079897` `Adjacent sequences: A166111 A166112 A166113 this_sequence A166115 A166116 A166117`
	KEYWORD	`easy,sign`
	AUTHOR	`Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Oct 06 2009`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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