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A125502 (Product of successive primes minus 2) divided by 7 is prime. 1
4127, 49727, 212627, 565727, 697727, 1152227, 3102227, 3486227, 5742227, 7488227, 8078627, 8848127, 10837727, 14200127, 23041427, 41870627, 50437727, 59044127, 68766227, 70088927, 91008227, 115141727, 118573727, 122641427 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

167*173 = 28891, (28891-2)/7 = 4127 the first entry.

MATHEMATICA

Select[(Times@@@Partition[Prime[Range[5000]], 2, 1]-2)/7, PrimeQ] (* Harvey P. Dale, Sep 03 2015 *)

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: A045032 A196896 A210312 * A168631 A117810 A236871

Adjacent sequences:  A125499 A125500 A125501 * A125503 A125504 A125505

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, Dec 28 2006

EXTENSIONS

Typo in example corrected by Harvey P. Dale, Sep 03 2015

STATUS

approved

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Last modified October 17 07:57 EDT 2018. Contains 316276 sequences. (Running on oeis4.)