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A209630 Numbers in A206853 without proper divisors > 1 from the same sequence. 0
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified March 5 15:22 EST 2021. Contains 341825 sequences. (Running on oeis4.)