id:A082644 - OEIS Search Results

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Floor(n*(n-1/2)/2).

+0
1

0, 0, 1, 3, 7, 11, 16, 22, 30, 38, 47, 57, 69, 81, 94, 108, 124, 140, 157, 175, 195, 215, 236, 258, 282, 306, 331, 357, 385, 413, 442, 472, 504, 536, 569, 603, 639, 675, 712, 750, 790, 830, 871, 913, 957, 1001, 1046, 1092, 1140, 1188, 1237, 1287, 1339, 1391, 1444, 1498 (list; graph; listen)

	OFFSET	`0,4`
	CROSSREFS	`Sequence in context: A022821 A001618 A118027 this_sequence A131024 A053982 A118000` `Adjacent sequences: A082641 A082642 A082643 this_sequence A082645 A082646 A082647`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), May 16 2003`

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

AT&T Labs Research