A359373 Nonmultiples of 4 that have an odd number of prime factors (with multiplicity).

2, 3, 5, 7, 11, 13, 17, 18, 19, 23, 27, 29, 30, 31, 37, 41, 42, 43, 45, 47, 50, 53, 59, 61, 63, 66, 67, 70, 71, 73, 75, 78, 79, 83, 89, 97, 98, 99, 101, 102, 103, 105, 107, 109, 110, 113, 114, 117, 125, 127, 130, 131, 137, 138, 139, 147, 149, 151, 153, 154, 157, 162, 163, 165, 167, 170, 171, 173, 174

Offset: 1

Author

Antti Karttunen, Dec 28 2022

Keywords

• nonn

Crossrefs

Intersection of A026424 and A042968.

Setwise difference A042968 \ A359371.

Positions of negative terms in A358839.

Cf. A001222, A008836, A010873, A067019 (subsequence), A166486, A359372 (characteristic function).

Programs

Mathematica

Select[Range[200], And[LiouvilleLambda[#] < 0, ! Divisible[#, 4]] &] (* Michael De Vlieger, Dec 28 2022 *)

PARI

isA359373(n) = A359372(n);

Formula

{k | A008836(k) < 0 and A010873(k) > 0}.