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 A088824 Numbers n such that the sum of smallest prime factors of numbers from 1 to n is divisible by n. 5
 1, 2, 7, 14, 78, 113, 153, 439, 462, 1215, 2294, 8363, 11102, 12302, 36382, 38370, 60398, 199953, 224090, 421399, 427131, 1947938, 2467022, 2571633, 62395623, 462027217, 2140648015, 6418011931, 43074345625, 52714450814, 71229445182, 90719472005, 105685014433 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Giovanni Resta, Table of n, a(n) for n = 1..38 (terms < 7.5*10^12) FORMULA Solutions to Mod[A088821[x], x]=0. MATHEMATICA smp[n_] := If[n==1, 0, FactorInteger[n][[1, 1]]]; s = Accumulate @ Array[ smp, 10^5]; Select[Range[10^5], Mod[s[[#]], #] == 0 &] (* Giovanni Resta, Apr 27 2017 *) CROSSREFS Cf. A088821-A088825. Sequence in context: A018764 A018780 A132997 * A034903 A070898 A132746 Adjacent sequences:  A088821 A088822 A088823 * A088825 A088826 A088827 KEYWORD nonn AUTHOR Labos Elemer, Oct 22 2003 EXTENSIONS More terms from Ray Chandler, Oct 31 2003 a(27)-a(31) from Donovan Johnson, Jul 09 2010 a(32)-a(33) from Giovanni Resta, Apr 27 2017 STATUS approved

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Last modified April 19 20:37 EDT 2021. Contains 343117 sequences. (Running on oeis4.)