424704domain: NAppears in sequencesFrom second moments of unfriendly seating arrangement problem around a circular table with n seats.at n=8A239888Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,0 0,1 1,0 -1,-2 or 0,2.at n=9A264307