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 A180006 Composite numbers that can be obtained from primes by interchanging the first and last digits. 1
 91, 32, 92, 14, 34, 74, 35, 95, 16, 76, 38, 98, 301, 901, 721, 731, 931, 361, 371, 391, 791, 112, 322, 722, 922, 332, 932, 142, 152, 752, 362, 962, 172, 772, 182, 382, 392, 703, 713, 133, 943, 763, 973, 793, 104, 904, 914, 124, 134, 334, 934, 344, 944, 754 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The primes must contain at least two digits. LINKS EXAMPLE The composite number 752 is obtained from the prime 257 by interchanging the first and last digits. CROSSREFS The corresponding primes are A076056. Cf. A002808, A179826. Sequence in context: A284439 A119656 A339141 * A259085 A033411 A329915 Adjacent sequences:  A180003 A180004 A180005 * A180007 A180008 A180009 KEYWORD nonn,base AUTHOR Parthasarathy Nambi, Aug 06 2010 EXTENSIONS More terms from Vincenzo Librandi, Aug 06 2010 STATUS approved

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Last modified September 24 02:52 EDT 2021. Contains 347620 sequences. (Running on oeis4.)