id:A051940 - OEIS Search Results

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A051940

Truncated triangular numbers: a(n)=n*(n+1)/2-3*t*(t+1)/2, t=4.

+0
2

6, 15, 25, 36, 48, 61, 75, 90, 106, 123, 141, 160, 180, 201, 223, 246, 270, 295, 321, 348, 376, 405, 435, 466, 498, 531, 565, 600, 636, 673, 711, 750, 790, 831, 873, 916, 960, 1005, 1051, 1098, 1146, 1195, 1245, 1296, 1348, 1401, 1455, 1510, 1566, 1623 (list; graph; listen)

	OFFSET	`8,1`
	MATHEMATICA	`Table[n*(n + 1)/2 - 30, {n, 8, 70}] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Mar 31 2006`
	CROSSREFS	`a(n)=A000217(n)-30, n>7` `Sequence in context: A122709 A052220 A064565 this_sequence A020207 A008440 A022601` `Adjacent sequences: A051937 A051938 A051939 this_sequence A051941 A051942 A051943`
	KEYWORD	`easy,nice,nonn`
	AUTHOR	`Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Dec 21 1999`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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