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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
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
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