# A200537 (b-file synthesized from sequence entry) 0 1 1 1 2 9 3 13 4 40 5 72 6 144 7 252 8 432 9 720 10 1152 11 1872 12 2880 13 4608 14 6912 15 10944 16 16128 17 25344 18 36864 19 57600 20 82944 21 129024 22 184320 23 285696 24 405504 25 626688 26 884736 27 1363968 28 1916928 29 2949120 30 4128768 31 6340608 32 8847360 33 13565952 34 18874368 35 28901376 36 40108032 37 61341696 38 84934656 39 129761280