id:A154691 - OEIS Search Results

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Expansion of (1+x+x^2)/((1-x-x^2)(1-x)).

+0
2

1, 3, 7, 13, 23, 39, 65, 107, 175, 285, 463, 751, 1217, 1971, 3191, 5165, 8359, 13527, 21889, 35419, 57311, 92733, 150047, 242783, 392833, 635619, 1028455, 1664077, 2692535, 4356615, 7049153, 11405771, 18454927, 29860701, 48315631, 78176335 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n+1)-a(n)=A006355(n+3) = A055389(n+3). a(n) = A066629(n-1)+A066629(n). a(n)=A006355(n+4)-3=A078642(n+1)-3.`
	MAPLE	`A := proc(n) coeftayl( (1+x+x^2)/(1-x-x^2)/(1-x), x=0, n) ; end: for n from 0 to 50 do printf("%d, ", A(n)) ; od:`
	CROSSREFS	`Sequence in context: A136851 A155339 A122886 this_sequence A078447 A066624 A061761` `Adjacent sequences: A154688 A154689 A154690 this_sequence A154692 A154693 A154694`
	KEYWORD	`easy,nonn`
	AUTHOR	`R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 14 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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