id:A088941 - OEIS Search Results

Search: id:A088941

Displaying 1-1 of 1 results found.

page 1

a(n)=12*sum(1<=i<=j<=k<=n,i*j/k).

+0
5

0, 12, 54, 154, 349, 685, 1217, 2009, 3134, 4674, 6720, 9372, 12739, 16939, 22099, 28355, 35852, 44744, 55194, 67374, 81465, 97657, 116149, 137149, 160874, 187550, 217412, 250704, 287679, 328599, 373735, 423367, 477784, 537284, 602174, 672770 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Always an integer.`
	FORMULA	`a(n)=(n/24)(9n^3 + 58n^2 + 123n + 98)`
	PROGRAM	`(PARI) a(n)=if(n<0, 0, a(n)=n/24(9n^3 + 58n^2 + 123n + 98))`
	CROSSREFS	`Cf. A088942, A088943.` `A051798(n) - 1.` `Sequence in context: A022704 A060785 A059986 this_sequence A019582 A025204 A005549` `Adjacent sequences: A088938 A088939 A088940 this_sequence A088942 A088943 A088944`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 25 2003`

page 1

Search completed in 0.002 seconds

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research