114588domain: NAppears in sequencesTriangle T(n, k) read by rows: row n gives the coefficients of the numerator polynomials of the o.g.f. of the (n+1)-th diagonal of the Sheffer triangle A282629 (S2[3,1] generalized Stirling2), for n >= 0.at n=13A290316G.f. satisfies A(x) = 1 + x / (1 - x*A(x))^4.at n=9A365114