A075634 - OEIS

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A075634

Final terms of groups in A075631.

1, 2, 5, 18, 98, 306, 9378, 1726173, 13347339101, 321699559882750173, 4716070968330003553938242926173, 23987291841663781653328392594255840802707701158676395298 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`a(n) = A075633(n+1) - 1. Also, a(n) = (sqrt(8*(A075631(1) + A075631(2) + ... + A075631(n)) + 1) - 1) / 2. [From Max Alekseyev (maxale(AT)gmail.com), May 08 2009]`
	CROSSREFS	`Cf. A075631, A075632, A075633.` `Sequence in context: A058119 A075441 A187008 * A007127 A005639 A093730` `Adjacent sequences: A075631 A075632 A075633 * A075635 A075636 A075637`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 30 2002`
	EXTENSIONS	`More terms from Jonathan Cross (jcross(AT)juggler.net), May 08 2004` `One more term from Max Alekseyev (maxale(AT)gmail.com), May 08 2009`

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Last modified February 14 16:29 EST 2012. Contains 205635 sequences.