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%I #6 Mar 27 2022 18:31:30
%S 1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,2,1,1,1,1,1,1,1,1,1,1,1,2,1,2,1,1,
%T 1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,2,1,1,1,1,1
%N A051731 + A000012 - A103451.
%C Row sums = A134871: (1, 2, 3, 5, 5, 8, 7, 10, 10, 12, 11, ...).
%F A051731 + A000012 - A103451 as infinite lower triangular matrices.
%e First few rows of the triangle:
%e 1;
%e 1, 1;
%e 1, 1, 1;
%e 1, 2, 1, 1;
%e 1, 1, 1, 1, 1;
%e 1, 2, 2, 1, 1, 1;
%e 1, 1, 1, 1, 1, 1, 1;
%e 1, 2, 1, 2, 1, 1, 1, 1;
%e ...
%Y Cf. A051731, A134871, A103451, A000012.
%K nonn,tabl
%O 1,8
%A _Gary W. Adamson_, Nov 14 2007