A167609 Primes which are not the sum of two consecutive nonprimes A141468.

2, 3, 7, 11, 13, 23, 37, 47, 59, 61, 73, 83, 107, 157, 167, 179, 193, 227, 263, 277, 313, 347, 359, 383, 397, 421, 457, 467, 479, 503, 541, 563, 587, 613, 661, 673, 719, 733, 757, 839, 863, 877, 887, 983, 997, 1019, 1093, 1153, 1187, 1201, 1213, 1237, 1283

Offset

1,1

Comments

2, and primes p such that floor(p/2) or ceiling(p/2) is prime, but not both. - Robert Israel, Jan 23 2024

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

filter:= proc(n) if n mod 4 = 1
  then isprime(n) and isprime((n+1)/2)
  else isprime(n) and isprime((n-1)/2)
fi end proc:
2, 3, op(select(filter, [seq(i, i=7 .. 10000, 2)])); # Robert Israel, Jan 23 2024

Crossrefs

Cf. A000040, A005383, A005385, A060254, A079149, A141468.

Sequence in context: A091206 A357713 A038963 * A117112 A145032 A233414

Adjacent sequences: A167606 A167607 A167608 * A167610 A167611 A167612

Keyword

nonn

Author

Juri-Stepan Gerasimov, Nov 07 2009

Extensions

Entries checked by R. J. Mathar, May 30 2010

Status

approved