A054775 Positive multiples of 6 which are not the midpoint of a pair of twin primes.

24, 36, 48, 54, 66, 78, 84, 90, 96, 114, 120, 126, 132, 144, 156, 162, 168, 174, 186, 204, 210, 216, 222, 234, 246, 252, 258, 264, 276, 288, 294, 300, 306, 318, 324, 330, 336, 342, 354, 360, 366, 372, 378, 384, 390, 396, 402, 408, 414, 426, 438, 444, 450, 456, 468, 474

Offset: 1

Author

Stuart M. Ellerstein (ellerstein(AT)aol.com), May 19 2000

Keywords

• nonn

Crossrefs

Cf. A067611 (sequence divided by 6).

Programs

Magma

[ n: n in [6..600 by 6] | not IsPrime(n-1) or not IsPrime(n+1) ];  // Klaus Brockhaus, Aug 18 2010

PARI

forstep(n=6,600,6,if(!(isprime(n-1)&&isprime(n+1)),print1(n,","))) \\ Klaus Brockhaus, Aug 18 2010

Extensions

Corrected by Zak Seidov and Klaus Brockhaus, Aug 18 2010

Edited by N. J. A. Sloane, Aug 19 2010