A086445 - OEIS

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A086445

Partial sums of A005578.

1, 2, 4, 7, 13, 24, 46, 89, 175, 346, 688, 1371, 2737, 5468, 10930, 21853, 43699, 87390, 174772, 349535, 699061, 1398112, 2796214, 5592417, 11184823, 22369634, 44739256, 89478499, 178956985, 357913956, 715827898, 1431655781, 2863311547 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`a(n)=A000975(n)+A008619(n).`
	FORMULA	`G.f.: (1-x-x^2)/((1+x)(1-x)^2(1-2x)); a(n)=22^n/3+(-1)^n/12+n/2+1/4.` `a(0) = 1, a(n) = floor(2a(n-1) - n/2 + 1) for n > 0 - Gerald McGarvey (Gerald.McGarvey(AT)comcast.net), Aug 31 2004`
	CROSSREFS	`Sequence in context: A018185 A191526 A005255 * A127602 A113291 A102112` `Adjacent sequences: A086442 A086443 A086444 * A086446 A086447 A086448`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 20 2003`

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Last modified February 17 04:58 EST 2012. Contains 205985 sequences.