A131948 Triangle T(n,k) = 2*A002024(n+1,k+1) + A007318(n,k) - 2, read by rows.
1, 3, 3, 5, 6, 5, 7, 9, 9, 7, 9, 12, 14, 12, 9, 11, 15, 20, 20, 15, 11, 13, 18, 27, 32, 27, 18, 13, 15, 21, 35, 49, 49, 35, 21, 15, 17, 24, 44, 72, 86, 72, 44, 24, 17, 19, 27, 54, 102, 144, 144, 102, 54, 27, 19
Offset: 0
Examples
First few rows of the triangle are: 1; 3, 3; 5, 6, 5; 7, 9, 9, 7; 9, 12, 14, 12, 9; 11, 15, 20, 20, 15, 11; 13, 18, 27, 32, 27, 18, 13; 15, 21, 35, 49, 49, 35, 21, 15; ...
Comments