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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.
1
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
CROSSREFS
Cf. A243857.
Sequence in context: A252515 A252516 A252523 * A252682 A235093 A259959
KEYWORD
nonn
AUTHOR
STATUS
approved