login
A105442
Numbers with at least two odd prime factors (not necessarily distinct) such that in binary representation all divisors of n are contained in n.
1
55, 215, 407, 1403, 1681, 3223, 3362, 3415, 6724, 13448, 13655, 15487, 25751, 80089, 146621, 160178, 218455, 237169, 320356, 445663, 464711, 474338, 873815, 948676, 1662743, 1897352, 1932377, 1975531, 2484187, 3223001, 3410639, 3872639
OFFSET
1,1
COMMENTS
Intersection of A093641 and A105441;
A087436(a(n)) > 1.
CROSSREFS
Sequence in context: A334531 A161763 A189005 * A158646 A294461 A013550
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Apr 09 2005
STATUS
approved