66769domain: NAppears in sequencesTriangle formed by coefficients of the expansion of p(x, n), where p(x,n) = (1+x-x^2)^(n+1)*Sum_{j >= 0} (j+1)^n*(-x + x^2)^j.at n=54A156890Numerator of Laguerre(n, -2).at n=8A160615