A109569 - OEIS

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A109569

a(n) = If[Floor[2*Mod[(Prime[n + 1] - Prime[n])*PrimePi[n]/n, 8]] == 15, Prime[n]]

19609, 25471, 35617, 44293, 58831, 89689 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,1`
	LINKS	`Table of n, a(n) for n=0..5.`
	MATHEMATICA	`a = Flatten[Table[If[Floor[2Mod[(Prime[n + 1] - Prime[n])PrimePi[n]/n, 8]] == 15, Prime[n], {}], {n, 1, 10000}]]`
	CROSSREFS	`Cf. A001359.` `Sequence in context: A115472 A022234 A082890 * A204665 A031681 A118924` `Adjacent sequences: A109566 A109567 A109568 * A109570 A109571 A109572`
	KEYWORD	`nonn`
	AUTHOR	`Roger L. Bagula, Jun 27 2005`
	STATUS	`approved`

Last modified March 5 16:55 EST 2021. Contains 341827 sequences. (Running on oeis4.)