# A333665 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 6 5 12 6 24 7 36 8 60 9 120 10 240 11 360 12 720 13 840 14 1680 15 2520 16 5040 17 10080 18 27720 19 30240 20 55440 21 110880 22 166320 23 332640 24 720720 25 1441440 26 2162160 27 3603600 28 4324320