A159329 - OEIS

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A159329

Transform of the finite sequence (1, 0, -1) by the T_{1,1} transformation (see link)

2, 4, 9, 23, 54, 125, 290, 674, 1567, 3643, 8469, 19688, 45769, 106400, 247350, 575019, 1336757, 3107583, 7224254, 16794353, 39042134, 90761950, 210995935, 490506039, 1140288197, 2650848448, 6162474989, 14326016268, 33303947274 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	LINKS	`Richard Choulet Curtz-like transformation`
	FORMULA	`O.g.f f(z)=((1-z)^2/(1-3z+2z^2-z^3))(1-z^2)+(z/(1-3z+2z^2-z^3))+((1-z+z^2)/(1-3z+2z^2-z^3)) a(0)=2, a(1)=4, a(2):=9, a(3):=23, a(4):=54 and for n>=2 a(n+3)=3a(n+2)-2*a(n+1)+a(n)`
	CROSSREFS	`A159328` `Sequence in context: A077003 A046917 A187044 * A159334 A159330 A159331` `Adjacent sequences: A159326 A159327 A159328 * A159330 A159331 A159332`
	KEYWORD	`easy,nonn`
	AUTHOR	`Richard Choulet (richardchoulet(AT)yahoo.fr), Apr 10 2009`

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Last modified February 15 21:10 EST 2012. Contains 205856 sequences.