A156313 Primes that cannot be written as prime(k) + prime(k+1)*m.

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

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