id:A136299 - OEIS Search Results

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a(n)=3a(n-1)-4a(n-3), n>3.

+0
2

1, 2, 4, 7, 13, 23, 41, 71, 121, 199, 313, 455, 569, 455, -455, -3641, -12743, -36409, -94663, -233017, -553415, -1281593, -2912711, -6524473, -14447047, -31690297, -68972999, -149130809, -320631239, -686001721, -1461481927, -3101920825, -6561755591, -13839339065 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`O.g.f.: -(-1+x+2x^2+x^3)/[(1+x)(-1+2x)^2]. a(n)=11*2^n/9+(-1)^n/9-A001787(n+1)/12 if n>0. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 04 2008`
	CROSSREFS	`Cf. A051013.` `Sequence in context: A051013 A128609 A114832 this_sequence A003116 A078038 A048888` `Adjacent sequences: A136296 A136297 A136298 this_sequence A136300 A136301 A136302`
	KEYWORD	`sign,easy`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Mar 22 2008`
	EXTENSIONS	`More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 04 2008`

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Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.

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