5748750domain: NAppears in sequencesNumber of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 2 local maxima.at n=3A159728Array read by antidiagonals: T(n,k) is the number of permutations of k indistinguishable copies of 1..n arranged in a circle with exactly 2 local maxima.at n=18A334772