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A124488 Numbers k such that 2*k-1, 4*k-1, 6*k-1, 8*k-1 and 10*k-1 are primes. 2
3, 45, 6450, 18000, 22785, 41790, 54180, 77385, 87675, 98385, 103005, 104520, 151515, 187005, 210210, 244590, 256620, 320775, 329175, 354795, 382875, 387975, 431385, 495540, 509355, 528510, 632775, 763815, 804870, 810540, 812175, 849285 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[Range[900000], And @@ PrimeQ /@ ({2, 4, 6, 8, 10}*# - 1) &] (* Ray Chandler, Nov 21 2006 *)

CROSSREFS

Cf. A124485-A124492.

Sequence in context: A302156 A229415 A265621 * A086683 A155203 A183131

Adjacent sequences:  A124485 A124486 A124487 * A124489 A124490 A124491

KEYWORD

nonn

AUTHOR

Artur Jasinski, Nov 04 2006

STATUS

approved

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Last modified October 27 10:47 EDT 2021. Contains 348274 sequences. (Running on oeis4.)