7373520domain: NAppears in sequencesA partition product of Stirling_2 type [parameter k = 3] with biggest-part statistic (triangle read by rows).at n=33A157403Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,1 0,-1 0,2 1,0 or -1,0.at n=9A264251