%I #6 Oct 21 2019 19:27:32

%S 0,1,0,2,0,0,0,2,0,3,0,-1,0,3,0,2,0,0,0,4,0,4,0,-1,0,4,0,5,0,-2,0,2,0,

%T 1,0,0,0,3,0,4,0,-1,0,4,0,4,0,0,0,5,0,5,0,-1,0,5,0,3,0,-2,0,3,0,2,0,0,

%U 0,4,0,4,0,-1,0,5,0,5,0,0,0,5,0,6,0,-1,0,4,0,6,0,-2,0,4,0,5,0,0,0,5,0,5,0,-1,0,5,0

%N a(n) = A328578(n) - A257993(n).

%H Antti Karttunen, <a href="/A328590/b328590.txt">Table of n, a(n) for n = 1..65537</a>

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

%F a(n) = A328578(n) - A257993(n).

%o (PARI)

%o A257993(n) = { for(i=1,oo,if(n%prime(i),return(i))); }

%o A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };

%o A328578(n) = A257993(A276086(A276086(n)));

%o A328590(n) = (A328578(n) - A257993(n));

%Y Cf. A257993, A276086, A328578, A328585 (positions of zeros), A328587 (of negative terms), A328588 (of positive terms).

%Y Cf. A328591 (even bisection).

%K sign

%O 1,4

%A _Antti Karttunen_, Oct 21 2019