A139299 - OEIS

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A139299

2^(2p - 1)/4-1, where p is a Mersenne prime A000668(n).

7, 2047, 576460752303423487 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	FORMULA	`a(n) = 2^(2*A000668(n)-1)/4-1 = A139294(n)/4-1 = A139298(n)-1.`
	CROSSREFS	`Sequence in context: A145253 A024099 A056235 * A004818 A125538 A129732` `Adjacent sequences: A139296 A139297 A139298 * A139300 A139301 A139302`
	KEYWORD	`bref,nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Apr 13 2008`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.