A139297 - OEIS

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A139297

2^(2p - 1)/2-1, where p is a Mersenne prime A000668(n).

15, 4095, 1152921504606846975 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	FORMULA	`a(n) = 2^(2*A000668(n)-1)/2-1 = A139296(n)-1.`
	CROSSREFS	`Sequence in context: A153832 A198524 A172322 * A070907 A079919 A027513` `Adjacent sequences: A139294 A139295 A139296 * A139298 A139299 A139300`
	KEYWORD	`bref,nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Apr 13 2008`

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Last modified February 15 12:24 EST 2012. Contains 205785 sequences.