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A154526 Primes p such that lcm(1,2,3,...,p-2,p-1,p) -+ 1 are both primes. 2
3, 5, 7, 19, 47 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Intersection of A154524 and A154525.

LINKS

Table of n, a(n) for n=1..5.

PROG

(PARI) isok(p) = {if (! isprime(p), return (0)); lcmv = lcm(vector(p, i, i)); isprime(lcmv + 1) && isprime(lcmv - 1); } \\ Michel Marcus, Oct 26 2013

CROSSREFS

Cf. A056604, A154524, A154525.

Sequence in context: A005850 A052334 A322302 * A126144 A171643 A072002

Adjacent sequences:  A154523 A154524 A154525 * A154527 A154528 A154529

KEYWORD

more,nonn

AUTHOR

Lekraj Beedassy, Jan 11 2009

STATUS

approved

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Last modified September 27 17:05 EDT 2021. Contains 347693 sequences. (Running on oeis4.)