id:A085742 - OEIS Search Results

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T(n^3)-T(n) where T() are the triangular numbers (A000217).

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0, 0, 33, 372, 2070, 7860, 23415, 58968, 131292, 266040, 500445, 886380, 1493778, 2414412, 3766035, 5696880, 8390520, 12071088, 17008857, 23526180, 32003790, 42887460, 56695023, 74023752, 95558100, 122077800, 154466325, 193719708 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`(n-1)n(n+1)(n^3+n+1)/2.`
	EXAMPLE	`a(3)=T(3^3)-T(3)=T(27)-T(3)=378-6-372`
	PROGRAM	`(PARI) t(n)=n*(n+1)/2; for(n=0, 50, print1(t(n^3)-t(n)", "))`
	CROSSREFS	`Cf. A000217.` `Sequence in context: A081932 A121994 A093743 this_sequence A107965 A058796 A002608` `Adjacent sequences: A085739 A085740 A085741 this_sequence A085743 A085744 A085745`
	KEYWORD	`nonn`
	AUTHOR	`Jon Perry (perry(AT)globalnet.co.uk), Jul 21 2003`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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