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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
OFFSET
1,2
COMMENTS
Composite terms are 895, 1007, 2047, 3071, 4031, 16255, 16351, 16375, 49151, 65279, 65531, 196607, 229375,...
CROSSREFS
Cf. A206853.
Sequence in context: A045370 A117048 A040128 * A235266 A140548 A243630
KEYWORD
nonn,base
AUTHOR
Vladimir Shevelev, Mar 13 2012
STATUS
approved