A243857 - OEIS

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A243857

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.

32469, 42717, 45009, 57669, 64377, 64893, 66741, 76389, 78363, 81723, 95259, 95283, 165567, 203811, 216627, 218193, 218949, 240819, 255153, 272523, 282147, 308481, 317841, 324981, 327879, 338733, 347289, 355479, 359847, 364383, 414417, 424917, 425829, 433107

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OFFSET

1,1

LINKS

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

CROSSREFS

Cf. A243858.

Sequence in context: A236656 A031639 A233680 * A028240 A251000 A134698

Adjacent sequences: A243854 A243855 A243856 * A243858 A243859 A243860

KEYWORD

nonn

AUTHOR

Arkadiusz Wesolowski, Jun 12 2014

STATUS

approved