%I #5 Feb 18 2022 22:07:03

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

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

%N Inverse of A128189.

%C Row sums = 1, 2, 1, 1, 0, 1, 0, 0, 1, 0, ... (the first 10 terms of A104162).

%F Inverse of A128189 as an infinite lower triangular matrix.

%e First few rows of the triangle:

%e 1;

%e 1, 1;

%e 0, 0, 1;

%e 0, 0, 0, 1;

%e 0, 0, -1, 0, 1;

%e 0, 0, 1, -1, 0, 1;

%e ...

%Y Cf. A104162, A128189.

%K tabl,sign

%O 0,1

%A _Gary W. Adamson_, Feb 17 2007