107022domain: NAppears in sequences(-1)^n * coefficient of x^n in 1/x-1/(1-eta(x)) power series.at n=31A082531a(n) is the number of positive integer solutions of n*x*y*z*v*w = (x + n) * (y + n) * (z + n) * (v + n) * (w + n), x <= y <= z <= v <= w.at n=24A381644