16976806domain: NAppears in sequencesColumn 1 of triangle A128564; a(n) equals the number of permutations of {1..n+2} with [n/2+1] inversions for n>=0.at n=19A128565Number of reduced words of length n in the Weyl group A_20.at n=10A161513Number of solutions winning the Tchoukaillon game with n seeds and 2n pits.at n=10A382454