A134709 - OEIS

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A134709

Even superperfect numbers divided by 2, minus 1.

0, 1, 7, 31, 2047, 32767, 131071, 536870911, 576460752303423487, 154742504910672534362390527 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,3`
	LINKS	`Table of n, a(n) for n=1..10.`
	FORMULA	`a(n)=(A061652(n)/2) - 1.`
	EXAMPLE	`a(5)=2047 because the 5th even superperfect number is 4096 and (4096/2)-1=2047.`
	CROSSREFS	`Cf. A019279, A061652, A133028.` `Sequence in context: A280038 A253640 A191297 * A139314 A290969 A163083` `Adjacent sequences: A134706 A134707 A134708 * A134710 A134711 A134712`
	KEYWORD	`more,nonn`
	AUTHOR	`Omar E. Pol, Nov 07 2007`
	STATUS	`approved`

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Last modified October 23 03:37 EDT 2018. Contains 316519 sequences. (Running on oeis4.)