id:A130481 - OEIS Search Results

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Sum {0<=k<=n, k mod 3} (Partial sums of A010872).

+0
27

0, 1, 3, 3, 4, 6, 6, 7, 9, 9, 10, 12, 12, 13, 15, 15, 16, 18, 18, 19, 21, 21, 22, 24, 24, 25, 27, 27, 28, 30, 30, 31, 33, 33, 34, 36, 36, 37, 39, 39, 40, 42, 42, 43, 45, 45, 46, 48, 48, 49, 51, 51, 52, 54, 54, 55, 57, 57, 58, 60, 60, 61, 63, 63, 64, 66, 66, 67, 69, 69, 70, 72, 72 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Essentially the same as A092200. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 13 2008`
	LINKS	`Index entries for sequences related to linear recurrences with constant coefficients`
	FORMULA	`a(n)=3floor(n/3)+A010872(n)(A010872(n)+1)/2. G.f.: g(x)=(2x^2+x)/((1-x^3)(1-x)).`
	MAPLE	`a:=n->add(chrem( [n, j], [1, 3] ) , j=1..n):seq(a(n), n=0..72); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 07 2009]`
	CROSSREFS	`Cf. A010872, A010873, A010874, A010875, A010876, A010877. A130482, A130483, A130484.` `Sequence in context: A008443 A074883 A092200 this_sequence A145805 A098238 A088651` `Adjacent sequences: A130478 A130479 A130480 this_sequence A130482 A130483 A130484`
	KEYWORD	`nonn`
	AUTHOR	`Hieronymus Fischer (Hieronymus.Fischer(AT)gmx.de), May 29 2007`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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