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A373492 Numbers k for which A059975(k) and A083345(k) are both multiples of 3, where A059975 is fully additive with a(p) = p-1, and A083345 is the numerator of the fully additive function with a(p) = 1/p.

%I A373492 #7 Jun 10 2024 14:56:11
%S A373492 1,8,20,44,50,64,68,92,110,116,125,160,164,170,188,212,230,236,242,
%T A373492 275,284,290,332,343,352,356,374,400,404,410,425,428,452,470,506,512,
%U A373492 524,530,544,548,575,578,590,596,605,637,638,668,692,710,716,725,736,764,782,788,830,880,890,902,908,928,931,932,935
%N A373492 Numbers k for which A059975(k) and A083345(k) are both multiples of 3, where A059975 is fully additive with a(p) = p-1, and A083345 is the numerator of the fully additive function with a(p) = 1/p.
%C A373492 A multiplicative semigroup: if m and n are in the sequence, then so is m*n.
%H A373492 Antti Karttunen, <a href="/A373492/b373492.txt">Table of n, a(n) for n = 1..10000</a>
%o A373492 (PARI) isA373492 = A373491;
%Y A373492 Cf. A059975, A083345, A373491 (characteristic function).
%Y A373492 Positions of multiples of 3 in A373377.
%Y A373492 Intersection of A373385 and A369644.
%Y A373492 Subsequence of A373494.
%K A373492 nonn
%O A373492 1,2
%A A373492 _Antti Karttunen_, Jun 10 2024