id:A083657 - OEIS Search Results

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a(n)=sum(i=1,n,floor(r*floor(r*i))) where r=sqrt(3).

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1, 6, 14, 24, 37, 54, 74, 96, 121, 150, 182, 216, 254, 295, 338, 384, 434, 487, 542, 600, 662, 727, 794, 865, 939, 1016, 1095, 1178, 1264, 1352, 1443, 1538, 1636, 1736, 1839, 1946, 2056, 2168, 2284, 2403, 2525, 2649, 2777, 2908, 3041, 3177, 3317, 3460, 3605 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = (n/2)*(3n-1)+ n/sqrt(3) + O(1)`
	CROSSREFS	`Sequence in context: A107400 A104675 A028557 this_sequence A010740 A095794 A119867` `Adjacent sequences: A083654 A083655 A083656 this_sequence A083658 A083659 A083660`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 13 2003`

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

AT&T Labs Research