id:A069498 - OEIS Search Results

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Triangular numbers of the form 10k.

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0, 10, 120, 190, 210, 300, 630, 780, 820, 990, 1540, 1770, 1830, 2080, 2850, 3160, 3240, 3570, 4560, 4950, 5050, 5460, 6670, 7140, 7260, 7750, 9180, 9730, 9870, 10440, 12090, 12720, 12880, 13530, 15400, 16110, 16290, 17020, 19110, 19900 (list; graph; listen)

	OFFSET	`0,2`
	MAPLE	`a[0] := 0:a[1] := 4:a[2] := 15:a[3] := 19:seq((20(floor(i/4))+a[i mod 4])(20*(floor(i/4))+a[i mod 4]+1)/2, i=1..100);`
	CROSSREFS	`Sequence in context: A024128 A030022 A069673 this_sequence A024127 A005949 A027568` `Adjacent sequences: A069495 A069496 A069497 this_sequence A069499 A069500 A069501`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 30 2002`
	EXTENSIONS	`Corrected and extended by Harvey P. Dale (hpd1(AT)nyu.edu) and Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 31 2002`

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Last modified December 4 20:00 EST 2008. Contains 151309 sequences.

AT&T Labs Research