A209630 Numbers in A206853 without proper divisors > 1 from the same sequence.

1, 2, 7, 11, 13, 31, 47, 59, 61, 127, 191, 223, 239, 251, 895, 991, 1007, 1019, 1021, 2047, 3071, 3583, 3967, 4031, 4079, 4091, 4093, 8191, 15359, 16127, 16255, 16319, 16351, 16375, 16381, 49151, 63487, 65279, 65407, 65519, 65531, 131071, 196607, 229375

Offset

1,2

Comments

Composite terms are 895, 1007, 2047, 3071, 4031, 16255, 16351, 16375, 49151, 65279, 65531, 196607, 229375,...

Links

Table of n, a(n) for n=1..44.

Crossrefs

Cf. A206853.

Sequence in context: A045370 A117048 A040128 * A235266 A140548 A243630

Adjacent sequences: A209627 A209628 A209629 * A209631 A209632 A209633

Keyword

nonn,base

Author

Vladimir Shevelev, Mar 13 2012

Status

approved