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 A001749 Primes multiplied by 4. 18
 8, 12, 20, 28, 44, 52, 68, 76, 92, 116, 124, 148, 164, 172, 188, 212, 236, 244, 268, 284, 292, 316, 332, 356, 388, 404, 412, 428, 436, 452, 508, 524, 548, 556, 596, 604, 628, 652, 668, 692, 716, 724, 764, 772, 788, 796, 844, 892, 908, 916, 932, 956, 964, 1004, 1028, 1052, 1076, 1084, 1108, 1124, 1132, 1172, 1228, 1244, 1252 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS n such that sum(d|n,(-1)^d)=A048272(n)=2. - Benoit Cloitre, Apr 14 2002 Solutions of the differential equation n'=n+4, where n' is the arithmetic derivative of n. - Paolo P. Lava, Feb 02 2012 LINKS Paolo P. Lava, Table of n, a(n) for n = 1..20000 MATHEMATICA 4 * Prime[Range[66]] (* Vladimir Joseph Stephan Orlovsky, Apr 29 2008 *) PROG (Haskell) a001749 = (* 4) . a000040  -- Reinhard Zumkeller, Feb 20 2012 (PARI) a(n)=4*prime(n) \\ Charles R Greathouse IV, Mar 25 2014 (MAGMA) [4*p: p in PrimesUpTo(300)]; // Vincenzo Librandi, Mar 26 2014 (PARI) 4 * primes(66) \\ Joerg Arndt, Mar 26 2014 CROSSREFS Sequence in context: A232867 A084488 A211410 * A175786 A258848 A072843 Adjacent sequences:  A001746 A001747 A001748 * A001750 A001751 A001752 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)