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A156059 Composite numbers whose binary representation reads as decimal prime. 2
185, 247, 253, 295, 329, 355, 405, 425, 453, 471, 533, 539, 565, 583, 595, 671, 675, 689, 703, 755, 781, 785, 815, 841, 855, 925, 989, 1037, 1075, 1099, 1113, 1121, 1159, 1189, 1207, 1219, 1269, 1287, 1305, 1329, 1341, 1403, 1413, 1441, 1473, 1521, 1541 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
185 is composite & 10111001 is prime.
313 is not in the sequence as it is prime in base 10.
MATHEMATICA
Select[Range[2900], ! PrimeQ[#]&&PrimeQ[FromDigits[IntegerDigits[#, 2]]]&] (* Vincenzo Librandi, Apr 18 2013 *)
CROSSREFS
Sequence in context: A262053 A362096 A157297 * A244248 A129311 A252272
KEYWORD
nonn,base
AUTHOR
Gerald Hillier, Feb 03 2009
EXTENSIONS
More terms from R. J. Mathar, Feb 10 2009
Edited by N. J. A. Sloane, Mar 17 2010
STATUS
approved

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Last modified March 29 09:14 EDT 2024. Contains 371268 sequences. (Running on oeis4.)