438729741450domain: NAppears in sequencesBinomial coefficient C(n,43).at n=12A010996Binomial coefficients C(55,n).at n=12A017771a(n) is the total number of down-steps after the final up-step in all 3_2-Dyck paths of length 4*n (n up-steps and 3*n down-steps).at n=13A334609