A243858 Odd numbers n divisible by 3 such that for all k >= 1 the numbers n*2^k - 1 and n*2^(k+1) - 1 do not form a pair of primes.

807, 6147, 22719, 35667, 35781, 39939, 56169, 60327, 62001, 107937, 108369, 124629, 127521, 164607, 172677, 180723, 181953, 200211, 201237, 228243, 233769, 243177, 244623, 278121, 296703, 302451, 303717, 311847, 316857, 344751, 352461, 371169, 392709, 458343

Offset

1,1

Links

Table of n, a(n) for n=1..34.

Crossrefs

Cf. A243857.

Sequence in context: A252515 A252516 A252523 * A252682 A235093 A259959

Adjacent sequences: A243855 A243856 A243857 * A243859 A243860 A243861

Keyword

nonn

Author

Arkadiusz Wesolowski, Jun 12 2014

Status

approved