A120185 a(1)=9; a(n)=floor((55+sum(a(1) to a(n-1)))/6).

9, 10, 12, 14, 16, 19, 22, 26, 30, 35, 41, 48, 56, 65, 76, 89, 103, 121, 141, 164, 192, 224, 261, 304, 355, 414, 483, 564, 658, 767, 895, 1044, 1218, 1421, 1658, 1935, 2257, 2633, 3072, 3584