A133140 - OEIS

This site is supported by donations to The OEIS Foundation.

A133140

Sum of the coefficients of the polynomial Q(n,x)=(1+x)[(1+x)^(n-1)+x^(n-1)], Q(0,x)=2.

2, 4, 6, 10, 18, 34, 66, 130, 258, 514, 1026, 2050, 4098, 8194, 16386, 32770, 65538, 131074, 262146, 524290, 1048578, 2097154, 4194306 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`Also row sums of A133138. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 12 2008`
	FORMULA	`a(n)=2*A094373(n). a(n)=A052548(n), n>0. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 12 2008`
	CROSSREFS	`Sequence in context: A102477 A018074 A000067 * A026680 A164141 A034872` `Adjacent sequences: A133137 A133138 A133139 * A133141 A133142 A133143`
	KEYWORD	`nonn`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Sep 21 2007`
	EXTENSIONS	`Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 12 2008`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 21:13 EST 2012. Contains 206085 sequences.