A114083 - OEIS

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A114083

Numbers n such that sigma(n) plus the n-th prime gives a fourth power.

1432, 220425, 499997, 3437037, 3518771, 5693370, 8913770 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..7.`
	EXAMPLE	`sigma(499997)+p(499997)=7890481=53^4.`
	PROG	`(PARI) isok(n) = ispower(sigma(n) + prime(n), 4); \\ Michel Marcus, Jan 11 2014`
	CROSSREFS	`Cf. A114081, subsequence of A114082.` `Sequence in context: A208628 A205070 A169822 * A143475 A245948 A221004` `Adjacent sequences: A114080 A114081 A114082 * A114084 A114085 A114086`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Resta, Feb 13 2006`
	STATUS	`approved`

Last modified April 18 16:51 EDT 2021. Contains 343089 sequences. (Running on oeis4.)