A048035 Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-3)/3.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 12, 13, 65, 70, 75, 225, 240, 255, 595, 630, 665, 1501, 1590, 1680, 4536, 4851, 5175, 16215, 17460, 18750, 57750, 62205, 66825, 190035, 204246, 218979, 590759, 634075, 679055, 1836471