%I #10 Jul 08 2024 06:23:59

%S 1,6,12,18,24,28,30,36,42,48,54,56,60,66,72,78,84,90,96,102,108,112,

%T 114,120,126,132,138,140,144,150,156,162,168,174,180,186,192,196,198,

%U 204,210,216,222,224,228,234,240,246,252,258,264,270,276,280,282,288,294,300,306,308,312,318,324,330,336,342,348,354,360

%N After initial 1, numbers k such that at least one of their divisors is a multiply-perfect number (A007691) larger than one.

%C A multiplicative semigroup: if m and n are in the sequence, then so is m*n.

%H Antti Karttunen, <a href="/A374198/b374198.txt">Table of n, a(n) for n = 1..20001</a>

%o (PARI) isA374198 = A374197;

%Y Indices of 1's in A374196.

%Y Cf. A007691, A097603 (essentially the same), A374197 (characteristic function).

%K nonn

%O 1,2

%A _Antti Karttunen_, Jul 07 2024