A268693 - OEIS

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A268693

Odd numbers that are not of the form p + 2^a + 2^b with b > a > 0, and p prime.

1, 3, 5, 7, 255, 15045, 20655, 25755, 39525, 44115, 46665, 65535, 70125, 97155, 100215, 132855, 144465, 162945, 196605, 200175, 277695, 280755, 327675, 441915, 469965, 548505, 688245, 720375, 770355, 773925, 789225, 1017705, 1027395, 1110015, 1114095, 1127355

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OFFSET

1,2

COMMENTS

This sequence is infinite; in particular, 2^(2^n) - 1 is in this sequence for each n > 2.

Not every member of this sequence greater than 7 is divisible by 255, see A268694.

LINKS

Kevin P. Thompson, Table of n, a(n) for n = 1..392

CROSSREFS

Cf. A232565, A268694. Supersequence of A156695.

Sequence in context: A174271 A211678 A082756 * A068832 A046472 A065824

Adjacent sequences: A268690 A268691 A268692 * A268694 A268695 A268696

KEYWORD

nonn

AUTHOR

Arkadiusz Wesolowski, Feb 11 2016

STATUS

approved