195528140640domain: NAppears in sequencesNumber of irreducible polynomials of degree n over GF(9); dimensions of free Lie algebras.at n=13A027381a(n) = floor(9^n/n).at n=12A129799a(n) + a(n+1) + a(n+2) = 3^n.at n=25A152733a(n) = (n^13 - n)/13.at n=9A366489