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%I #4 Feb 18 2022 22:36:59
%S 1,1,1,1,3,1,1,3,5,1,1,3,7,7,1,1,3,7,13,9,1,1,3,7,15,21,11,1,1,3,7,15,
%T 29,31,13,1,1,3,7,15,31,51,43,15,1,1,3,7,15,31,61,83,57,17,1
%N 2*A004070 - A000012.
%C Row sums = A104161: (1, 2, 5, 10, 19, 34, 59, ...).
%F 2*A004070 - A000012 as infinite lower triangular matrices. Reversal triangle of A131247, read by rows.
%e First few rows of the triangle:
%e 1;
%e 1, 1;
%e 1, 3, 1;
%e 1, 3, 5, 1;
%e 1, 3, 7, 7, 1;
%e 1, 3, 7, 13, 9, 1;
%e 1, 3, 7, 15, 21, 11, 1;
%e 1, 3, 7, 15, 29, 31, 13, 1;
%e ...
%Y Cf. A004070, A000012, A104161, A131247.
%K nonn,tabl
%O 0,5
%A _Gary W. Adamson_, Jun 23 2007
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