676626domain: NAppears in sequencesColumn 0 of triangle A116077.at n=10A116078Expansion 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=20A216605