A068531 - OEIS

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A068531

a(n)=(3^(2^n)-1)/2^(n+2).

1, 5, 205, 672605, 14476720225405, 13412827423017626893194723005, 23027704253395670256876704807446325518902757016163752166205, 135750441774555403090761510536778616322479346492704236319926586357457102177506285098634540189560165548644204629442284605 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`Every element of this sequence is an odd number (see link). - Graeme McRae (g_m(AT)mcraefamily.com), Jan 12 2005`
	LINKS	`Graeme McRae, Proof: for every positive integer k, there exists a positive integer m such that 3^m+5 is divisible by 2^k.`
	CROSSREFS	`Sequence in context: A002438 A005333 A162087 * A144139 A020541 A027682` `Adjacent sequences: A068528 A068529 A068530 * A068532 A068533 A068534`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 22 2002`

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Last modified February 16 12:15 EST 2012. Contains 205909 sequences.