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a(n) = A345415(A345872(n), A345872(n+1)).
3

%I #8 Jul 02 2021 03:34:54

%S 0,1,-1,2,3,-2,-3,-4,6,-5,5,9,4,7,-6,-8,-9,10,11,-7,-12,8,-11,-16,13,

%T -15,-19,-10,12,15,19,-13,20,-20,21,22,14,-17,18,23,16,17,-14,-25,26,

%U -23,27,-29,-28,-27,-26,29,-24,-33,25,33,-18,28,-22,31,-21,-35

%N a(n) = A345415(A345872(n), A345872(n+1)).

%C All terms are distinct.

%H Rémy Sigrist, <a href="/A345873/b345873.txt">Table of n, a(n) for n = 1..10000</a>

%H Rémy Sigrist, <a href="/A345873/a345873.gp.txt">PARI program for A345873</a>

%e a(3) = A345415(A345872(3), A345872(4)) = A345415(2, 3) = -1.

%o (PARI) See Links section.

%Y Cf. A345415, A345872.

%K sign

%O 1,4

%A _Rémy Sigrist_, Jun 27 2021