222530domain: NAppears in sequencesa(n) = n^2*(n^2 - 1)/6.at n=34A008911Number of arrangements of n indistinguishable balls in n boxes with the maximum number of balls in any box equal to n-3.at n=30A180293Integer areas of the tangential triangles corresponding to the integer-sided triangles with integer areas.at n=7A230361