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Positions of odd terms in A359815, where A359815 is the Dirichlet inverse of A359770, which is the characteristic function for numbers k such that k and bigomega(k) are of different parity.
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%I #4 Jan 15 2023 19:51:24

%S 1,2,4,9,12,15,16,18,20,21,25,28,30,32,33,35,36,39,42,44,49,50,51,52,

%T 55,57,60,65,66,68,69,70,76,77,78,84,85,87,91,92,93,95,98,100,102,108,

%U 110,111,114,115,116,119,121,123,124,128,129,130,132,133,135,138,140,141,143,145,148,154,155,156

%N Positions of odd terms in A359815, where A359815 is the Dirichlet inverse of A359770, which is the characteristic function for numbers k such that k and bigomega(k) are of different parity.

%o (PARI) isA359817(n) = A359816(n);

%Y Cf. A001222, A359770, A359815, A359816 (characteristic function).

%K nonn

%O 1,2

%A _Antti Karttunen_, Jan 15 2023