id:A115271 - OEIS Search Results

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Partial sums of floor((n+4)/4)^2.

+0
2

1, 2, 3, 4, 8, 12, 16, 20, 29, 38, 47, 56, 72, 88, 104, 120, 145, 170, 195, 220, 256, 292, 328, 364, 413, 462, 511, 560, 624, 688, 752, 816, 897, 978, 1059, 1140, 1240, 1340, 1440, 1540, 1661, 1782, 1903, 2024, 2168, 2312, 2456, 2600, 2769, 2938 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: (1+x^4)/((1-x)^2*(1-x^4)^2); a(n)=sum{k=0..n, floor((k+4)/2)^2}; a(n)=A115268(2n, n).`
	EXAMPLE	`Central coefficients of number triangle A115268.`
	CROSSREFS	`Sequence in context: A064418 A032939 A030073 this_sequence A062923 A133464 A085635` `Adjacent sequences: A115268 A115269 A115270 this_sequence A115272 A115273 A115274`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 18 2006`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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