A156605 - OEIS

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A156605

(4^n+20)/3 .

7, 8, 12, 28, 92, 348, 1372, 5468, 21852, 87388, 349532, 1398108, 5592412, 22369628, 89478492, 357913948, 1431655772, 5726623068, 22906492252, 91625968988, 366503875932, 1466015503708, 5864062014812, 23456248059228, 93824992236892, 375299968947548 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	LINKS	`Vincenzo Librandi, Table of n, a(n) for n = 0..1000`
	FORMULA	`a(n) = -A156591(2n+1).` `a(n)= 4+A154879(2n) = 7+A002450(n).` `a(n) = 4a(n-1)-20, n>0.` `G.f.: (7-27x)/((1-x)(1-4x)). - R. J. Mathar, Feb 23 2009`
	PROG	`(MAGMA) [(4^n+20)/3: n in [0..35]]; // Vincenzo Librandi, Jul 24 2011`
	CROSSREFS	`Sequence in context: A105832 A059177 A065729 * A061905 A025156 A045765` `Adjacent sequences: A156602 A156603 A156604 * A156606 A156607 A156608`
	KEYWORD	`nonn,easy`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Feb 11 2009`
	EXTENSIONS	`Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 23 2009`

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Last modified February 15 13:20 EST 2012. Contains 205798 sequences.