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%I A342460 #13 Mar 23 2021 16:16:56
%S A342460 0,1,1,1,1,0,1,0,0,0,1,0,1,0,0,1,1,0,1,0,0,0,1,0,0,0,1,0,1,1,1,0,0,0,
%T A342460 0,0,1,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,1,1,0,0,0,0,0,1,0,
%U A342460 0,1,1,1,1,0,0,0,0,0,1,0,0,0,1,1,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,1
%N A342460 a(n) = 1 if n > 1 and is divisible by the sum of its prime factors (with repetition), otherwise 0.
%C A342460 Characteristic function of A036844. a(n) - A010051(n) gives the characteristic function for A046346.
%H A342460 Antti Karttunen, <a href="/A342460/b342460.txt">Table of n, a(n) for n = 1..65537</a>
%H A342460 <a href="/index/Ch#char_fns">Index entries for characteristic functions</a>
%F A342460 a(1) = 0; and for n > 1, a(n) = [0=A238525(n)], where [ ] is the Iverson bracket.
%t A342460 Array[Boole[Mod[#, Total@ Flatten[ConstantArray[#1, #2] & @@@ FactorInteger[#]]] == 0] - Boole[# == 1] &, 105] (* _Michael De Vlieger_, Mar 19 2021 *)
%o A342460 (PARI) A342460(n) = if(n<2,0,my(f=factor(n)); !(n%((f[, 1]~*f[, 2])))); \\ After code in A001414 and A036844.
%Y A342460 Cf. A001414, A010051, A036844, A046346, A238525.
%K A342460 nonn
%O A342460 1
%A A342460 _Antti Karttunen_, Mar 18 2021

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