%I #8 Jan 14 2023 17:19:20
%S 1,2,6,9,10,14,15,18,21,22,25,26,30,33,34,35,38,39,42,46,49,50,51,54,
%T 55,57,58,62,65,66,69,70,74,77,78,81,82,85,86,87,90,91,93,94,95,98,
%U 102,106,110,111,114,115,118,119,121,122,123,126,129,130,133,134,135,138,141,142,143,145,146,150,154
%N Numbers k whose arithmetic derivative, A003415(k), has the opposite parity to k.
%o (PARI) isA359821(n) = A359820(n);
%Y Cf. A003415, A359820 (characteristic function), A359822 (complement).
%Y Positions of odd terms in A129283 and in A168036.
%K nonn,easy
%O 1,2
%A _Antti Karttunen_, Jan 14 2023
%E Name edited by _Peter Munn_, Jan 14 2023