142766domain: NAppears in sequencesNumber of directed rooted trees on n nodes with forbidden limbs.at n=8A014276T(2n+6,n), array T as in A055794.at n=12A055799Numbers n such that n^4 is a sum of 4th powers of four nonzero integers whose sum is n.at n=27A138760a(n) = Catalan(n) * (n^2 + 2) / (n + 2).at n=10A344191