14589803090domain: NAppears in sequencesNumber of fixed points in range [A014137(n-1)..A014138(n-1)] of permutations A127377/A127378 and A127387.at n=28A127389a(n) is the number of Dyck paths of length n without height of peaks 1 (mod 3) and height of valleys 2 (mod 3).at n=27A152173