765360domain: NAppears in sequencesNumber of length n+4 0..1 arrays with at most one downstep in every 4 consecutive neighbor pairs.at n=18A255988Sum T(n,k) of the k-th entries in all cycles of all permutations of [n]; triangle T(n,k), n>=1, 1<=k<=n, read by rows.at n=42A285793