268859domain: NAppears in sequencesNumber of Dyck n-paths with ascents and descents of length equal to 1 (mod 4).at n=26A023427Fibonacci sequence beginning 10, 9.at n=22A184959G.f. satisfies: A(x) = (1 + x*A(x)) * (1 + x^4*A(x)).at n=25A216116