# A109099 (b-file synthesized from sequence entry) 1 6 2 10 3 24 4 36 5 120 6 144 7 216 8 576 9 720 10 864 11 1296 12 2880 13 3456 14 4320 15 5040 16 5184 17 7776 18 13824 19 14400 20 17280 21 20736 22 25920 23 30240 24 31104 25 40320 26 46656 27 69120 28 82944 29 86400