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a(n) = 1 if A346242(n) = 0, otherwise 0.
2

%I #7 Jun 07 2022 16:02:14

%S 0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,

%T 0,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,

%U 0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1

%N a(n) = 1 if A346242(n) = 0, otherwise 0.

%H Antti Karttunen, <a href="/A354820/b354820.txt">Table of n, a(n) for n = 1..100000</a>

%H <a href="/index/Ch#char_fns">Index entries for characteristic functions</a>

%H <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a>

%o (PARI) A354820(n) = (0==A346242(n));

%Y Characteristic function of A354810, zeros of A346242.

%K nonn

%O 1

%A _Antti Karttunen_, Jun 07 2022