697680domain: NAppears in sequencesTriangle of coefficients, read by rows, where T(n,k) is the coefficient of x^n*y^k in f(x,y) that satisfies f(x,y) = (1+x) - x^2*(1+x)^3 + xy*f(x,y)^3.at n=52A086634a(n) = 6*binomial(n+1,7).at n=14A253947a(n) = Pochhammer(n, 5) / 2.at n=15A293615