26517domain: NAppears in sequencesTriangle T(n,k) with the coefficient [x^k] of 1/(1-2*x-x^2+x^3)^(n-k+1) in row n, column k.at n=63A188106Row 2 of array in A341731.at n=16A341732Number of Dyck bridges with resets from any height to zero from (0,0) to (n,0).at n=10A369982