33598domain: NAppears in sequencesAntidiagonal sums of square table A086623.at n=13A086625a(n) is the number of Dyck paths of semilength n without height of peaks 0 (mod 3) and height of valleys 1 (mod 3).at n=14A152172Irregular triangle T(n,k) read by rows: number of orbits of size 2^k on Dyck n-paths.at n=46A175137