133761domain: NAppears in sequencesNumber of length n+5 0..2 arrays with at most one downstep in every n consecutive neighbor pairs.at n=17A255112Triangle read by rows: T(n,k) = (-1)^(n+1) * A000166(n) + (-1)^(k) * A000166(k) for n >= 2 and 1 <= k <= n-1.at n=33A373966