id:A159329 - OEIS Search Results

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

+0
4

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; listen)

	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` `Adjacent sequences: A159326 A159327 A159328 this_sequence A159330 A159331 A159332` `Sequence in context: A000571 A077003 A046917 this_sequence A159334 A159330 A159331`
	KEYWORD	`easy,nonn`
	AUTHOR	`Richard Choulet (richardchoulet(AT)yahoo.fr), Apr 10 2009`

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Last modified November 8 20:39 EST 2009. Contains 166234 sequences.

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