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A124684 (Product of successive primes minus 2) divided by 5 is prime. 0
229, 1153, 14149, 15013, 189733, 214657, 253573, 350593, 514561, 522289, 725041, 853669, 1304581, 1453681, 2027569, 2183281, 2212453, 2469637, 3238513, 4166017, 4331941, 4467013, 5234689, 5510371, 5992933, 6102913, 8100097, 8130673 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

These numbers times 5 also form simiprimes.

LINKS

Table of n, a(n) for n=1..28.

EXAMPLE

31*37 = 1147, 1147-2 = 1145, 1145/5 = 229 the second entry.

PROG

(PARI) g(n, p) = { for(x=1, n, y=prime(x)*prime(x+1)-2; if(y%p==0, if(isprime(y/p), print1(y/p", ")))) }

CROSSREFS

Cf. A123921.

Sequence in context: A142608 A210514 A142665 * A178673 A028452 A072020

Adjacent sequences:  A124681 A124682 A124683 * A124685 A124686 A124687

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, Dec 27 2006

STATUS

approved

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Last modified August 24 03:20 EDT 2019. Contains 326260 sequences. (Running on oeis4.)