id:A104009 - OEIS Search Results

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Area of (a,a,a+1)-integer triangle. Corresponding a's are in A103974.

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0, 12, 1848, 351780, 68149872, 13219419708, 2564481115560, 497495864091732, 96511629630137568, 18722758603319903340, 3632118656731075949592, 704612296637707504759428, 136691153428925957468727120, 26517379152913151616036727452 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`s(n)=[(a+1)/4)]*sqrt[(3a+1)(a-1)] where a=A103974(n)`
	CROSSREFS	`Cf. A103974.` `Sequence in context: A090914 A049405 A049406 this_sequence A015028 A011920 A004823` `Adjacent sequences: A104006 A104007 A104008 this_sequence A104010 A104011 A104012`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Feb 24 2005`
	EXTENSIONS	`More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Sep 05 2005`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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