# A128648 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 12 5 60 6 5 7 80 8 720 9 7920 10 55440 11 55440 12 6160 13 6160 14 18480 15 425040 16 5525520 17 160240080 18 160240080 19 53413360 20 53413360 21 480720240 22 480720240 23 19709529840 24 19709529840 25 39419059680 26 197095298400 27 3350620072800 28 177582863858400