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 A195118 Numbers with largest and smallest prime factors differing by 6. 4
 55, 91, 187, 247, 275, 385, 391, 605, 637, 667, 1001, 1147, 1183, 1375, 1591, 1925, 1927, 2057, 2431, 2491, 2695, 3025, 3127, 3179, 3211, 4087, 4199, 4235, 4459, 4693, 4891, 5767, 6647, 6655, 6875, 7007, 7387, 7429, 8281, 8993, 9625, 9991, 10807, 11011 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..250 Eric Weisstein's World of Mathematics, Sexy Primes EXAMPLE a(10) = 667 = 23 * 29; a(11) = 1001 = 7 * 11 * 13; a(12) = 1147 = 31 * 37; a(13) = 1183 = 7 * 13^2. PROG (Haskell) a195118 n = a195118_list !! (n-1) a195118_list = filter f [3, 5..] where    f x = last pfs - head pfs == 6 where pfs = a027748_row x CROSSREFS Cf. A195106, A111192; A143205 is a subsequence. Sequence in context: A230125 A027865 A247681 * A143205 A111192 A063873 Adjacent sequences:  A195115 A195116 A195117 * A195119 A195120 A195121 KEYWORD nonn AUTHOR Reinhard Zumkeller, Sep 13 2011 STATUS approved

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Last modified October 20 07:33 EDT 2019. Contains 328252 sequences. (Running on oeis4.)