# A081863 (b-file synthesized from sequence entry) 1 24 2 240 3 168 4 480 5 264 6 21840 7 24 8 16320 9 3192 10 2640 11 552 12 43680 13 24 14 6960 15 57288 16 32640 17 24 18 15353520 19 24 20 216480 21 7224 22 5520 23 1128 24 1485120 25 264 26 12720 27 3192 28 13920 29 1416 30 454293840 31 24 32 65280 33 258888 34 240 35 18744 36 2241613920 37 24 38 240 39 13272 40 7360320 41 1992