OFFSET
1,2
COMMENTS
Numbers k such that A355689(k) > 0, where A355689 is the Dirichlet inverse of A166486, characteristic function of numbers that are not multiples of 4.
The asymptotic density of this sequence is 4/Pi^2 (A185199). - Amiram Eldar, Jan 18 2023
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Range[200], EvenQ[PrimeOmega[#]] && SquareFreeQ[#/2^IntegerExponent[#, 2]] &] (* Amiram Eldar, Jan 18 2023 *)
PROG
(PARI) isA359157(n) = A359156(n);
CROSSREFS
Positions of positive terms in A355689.
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 20 2022
STATUS
approved