5891760domain: NAppears in sequencesExpansion of e.g.f. (1-x)/(1-3*x+x^3).at n=7A052693Triangle read by rows, T(n, k) = Sum_{i=0..n} L'(n, n-i) * binomial(i, k), for k = 0..n-1.at n=31A059374