A359153 - OEIS

%I #5 Dec 17 2022 20:02:57

%S 3,7,11,19,23,27,31,43,47,59,63,67,71,75,79,83,99,103,107,127,131,139,

%T 147,151,163,167,171,175,179,191,195,199,207,211,223,227,231,239,243,

%U 251,255,263,271,275,279,283,307,311,331,343,347,359,363,367,379,383,387,399,419,423,431,435,439,443

%N Numbers of the form 4u+3 with an odd number of prime factors (counted with multiplicity).

%o (PARI) isA359153(n) = A359152(n);

%Y Intersection of A004767 and A026424.

%Y Setwise difference A067019 \ A359151.

%Y Setwise difference A004767 \ A359163.

%Y Cf. A002145 (subsequence).

%Y Cf. A359152 (characteristic function).

%K nonn

%O 1,1

%A _Antti Karttunen_, Dec 17 2022