184958domain: NAppears in sequencesLet M(n) be the n X n matrix m(i,j)=min(i,j) for 1<=i,j<=n then a(n) is the trace of M(n)^(-9).at n=5A114361Expansion of g.f. (6 + 5*x - 20*x^2 - 12*x^3 + 12*x^4 + 3*x^5)/(1 + x - 5*x^2 - 4*x^3 + 6*x^4 + 3*x^5 - x^6).at n=18A216605a(n) = floor(Sum_{k=n^3..(n+1)^3} k^(1/3)).at n=39A374384