A049825 a(n)=number of 4's in n-th row of array T given by A049816.
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 2, 2, 0, 1, 0, 2, 0, 3, 3, 2, 2, 3, 1, 4, 2, 4, 2, 2, 4, 6, 4, 6, 3, 7, 3, 10, 2, 5, 6, 6, 5, 6, 7, 6, 7, 13, 8, 6, 5, 9, 10, 14, 3, 19, 10, 11, 8, 8, 7, 14, 8, 10, 9
Offset: 1