A168355 Products of 3 distinct primes whose binary expansion is palindromic.

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

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Nov 23 2009

Keywords

• nonn
• base

Comments

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

Examples

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

Links

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

Crossrefs

Cf. A016041.

Programs

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