id:A069497 - OEIS Search Results

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Triangular numbers of the form 6k.

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0, 6, 36, 66, 78, 120, 210, 276, 300, 378, 528, 630, 666, 780, 990, 1128, 1176, 1326, 1596, 1770, 1830, 2016, 2346, 2556, 2628, 2850, 3240, 3486, 3570, 3828, 4278, 4560, 4656, 4950, 5460, 5778, 5886, 6216, 6786, 7140, 7260, 7626, 8256, 8646, 8778, 9180 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=A000217(A112652(n+1)-1). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 21 2007`
	MAPLE	`a[0] := 0:a[1] := 3:a[2] := 8:a[3] := 11:seq((12(floor(i/4))+a[i mod 4])(12*(floor(i/4))+a[i mod 4]+1)/2, i=1..100);`
	CROSSREFS	`Sequence in context: A121026 A036148 A134639 this_sequence A139249 A141277 A070150` `Adjacent sequences: A069494 A069495 A069496 this_sequence A069498 A069499 A069500`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 30 2002`
	EXTENSIONS	`More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Apr 01 2002` `More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 21 2007`

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Last modified September 4 21:24 EDT 2008. Contains 143414 sequences.

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