%I #4 Feb 18 2022 22:12:57
%S 1,-1,1,-1,-1,1,-1,1,-2,1,-1,-3,4,-3,1,-1,3,-7,7,-4,1,-1,-3,8,-13,11,
%T -5,1,-1,1,-10,21,-24,16,-6,1,-1,-5,17,-35,46,-40,22,-7,1,-1,7,-25,53,
%U -81,86,-62,29,-8,1
%N Triangle, A000012 * A128313.
%C Row sums = the Mertens sequence: A002321, (1, 0, -1, -1, -2, ...).
%F A000012 * A128313 as infinite lower triangular matrices.
%e First few rows of the triangle:
%e 1;
%e -1, 1;
%e -1, -1, 1;
%e -1, 1, -2, 1
%e -1, -3, 4, -3, 1;
%e -1, 3, -7, 7, -4, 1;
%e -1, -3, 8, -13, 11, -5, 1;
%e ...
%Y Cf. A128313, A000012, A002321.
%K tabl,sign
%O 1,9
%A _Gary W. Adamson_, Feb 25 2007