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A086133 Smallest prime factor of arithmetic derivative of n equals that of n. 0

%I #4 Oct 15 2013 22:32:14

%S 4,8,12,16,20,24,27,28,32,36,40,44,45,48,52,56,60,63,64,68,72,76,80,

%T 84,88,92,96,99,100,104,108,112,116,117,120,124,128,132,136,140,144,

%U 148,152,153,156,160,164,168,171,172,175,176,180,184,188,192,196,200,204

%N Smallest prime factor of arithmetic derivative of n equals that of n.

%Y Cf. A003415.

%K nonn

%O 1,1

%A _Labos Elemer_, Jul 23 2003

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)