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A156313 Primes that cannot be written as prime(k) + prime(k+1)*m. 3
2, 3, 7, 31, 67, 79, 97, 109, 151, 199, 211, 241, 331, 379, 409, 457, 499, 619, 631, 751, 757, 769, 877, 991, 1039, 1087, 1117, 1201, 1231, 1291, 1381, 1429, 1471, 1609, 1621, 1777, 1861, 1999, 2131, 2179, 2269, 2281, 2311, 2341, 2389, 2551, 2659, 2719, 2797 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A156311(A049084(a(n))) = 0.

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

PROG

(PARI) ok(t)=my(p=2); forprime(q=3, nextprime(t/2), if(t%q==p, return(0)); p=q); 1

select(ok, primes(100)) \\ Charles R Greathouse IV, Mar 13 2015

CROSSREFS

Cf. A156312.

Sequence in context: A326358 A008840 A268477 * A163075 A265113 A228171

Adjacent sequences:  A156310 A156311 A156312 * A156314 A156315 A156316

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Feb 07 2009

STATUS

approved

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Last modified August 13 05:41 EDT 2020. Contains 336442 sequences. (Running on oeis4.)