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A168355 Products of 3 distinct primes whose binary expansion is palindromic. 1
165, 195, 231, 255, 273, 455, 561, 645, 903, 1023, 1105, 1533, 2015, 2193, 2289, 2409, 2553, 2829, 3171, 3219, 3435, 3855, 3999, 4161, 4433, 4953, 5285, 5397, 5621, 5709, 6141, 6307, 6643, 7163, 7239, 7511, 8481, 9417, 9705, 10245, 11805, 12093, 12291 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All terms are odd. - Chai Wah Wu, Mar 28 2016

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000

EXAMPLE

165=3*5*11={1,0,1,0,0,1,0,1} 195=3*5*13={1,1,0,0,0,0,1,1}

MATHEMATICA

f1[n_]:=Reverse[IntegerDigits[n, 2]]==IntegerDigits[n, 2]; f2[n_]:=Last/@FactorInteger[n]=={1, 1, 1} lst={}; Do[If[f1[n]&&f2[n], AppendTo[lst, n]], {n, 8!}]; lst

CROSSREFS

Cf. A016041.

Sequence in context: A197440 A261758 A252725 * A083255 A259283 A270175

Adjacent sequences:  A168352 A168353 A168354 * A168356 A168357 A168358

KEYWORD

nonn,base

AUTHOR

Vladimir Joseph Stephan Orlovsky, Nov 23 2009

STATUS

approved

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Last modified May 29 21:17 EDT 2017. Contains 287257 sequences.