A374467 - OEIS

%I #7 Jul 14 2024 08:42:28

%S 2,3,5,7,11,13,17,19,23,29,30,31,37,41,42,43,47,53,59,61,66,67,70,71,

%T 72,73,78,79,83,89,97,101,102,103,105,107,108,109,110,113,114,127,128,

%U 130,131,137,138,139,149,151,154,157,163,165,167,170,173,174,179,180,181,182,186,190,191,192,193,195,197,199

%N Numbers that are products of an odd number of primes and the total number of 1-bits in the exponents of their prime factorization n is odd.

%H Antti Karttunen, <a href="/A374467/b374467.txt">Table of n, a(n) for n = 1..12000</a>

%F {k | A001222(k) is odd and A064547(k) is odd}.

%o (PAR) isA374467 = A374466;

%Y Cf. A001222, A064547, A374466 (characteristic function).

%Y Intersection of A000028 and A026424.

%Y Differs from A374595 first at n=43, where a(43) = 128, a term that is missing from A374595.

%K nonn

%O 1,1

%A _Antti Karttunen_, Jul 14 2024