A131950 A002024 + A131821 + A007318 - 2*A000012 as infinite lower triangular matrices.
1, 3, 3, 5, 4, 5, 7, 6, 6, 7, 9, 8, 10, 8, 9, 11, 10, 15, 15, 10, 11, 13, 12, 21, 26, 21, 12, 13, 15, 14, 28, 42, 42, 28, 14, 15, 17, 16, 36, 64, 78, 64, 36, 16, 17, 19, 18, 45, 93, 135, 135, 93, 45, 18, 19
Offset: 0
Examples
First few rows of the triangle: 1; 3, 3; 5, 4, 5; 7, 6, 6, 7; 9, 8, 10, 8, 9; 11, 10, 15, 15, 10, 11; 13, 12, 21, 26, 21, 12, 13; 15, 14, 28, 42, 42, 28, 14, 15; ...
Comments