77299domain: NAppears in sequencesNumber of standard Young tableaux with n cells and exactly ten successions.at n=6A241781a(1) = a(2) = 1; a(n+2) = 1 + Sum_{d|n} a(n/d) * a(d).at n=29A346116Triangle read by rows: T(n,k) is the number of nonisomorphic semigroups with n elements whose center contains k elements.at n=29A391159