# A163264 (b-file synthesized from sequence entry) 1 2 2 6 3 12 4 24 5 60 6 120 7 240 8 360 9 720 10 840 11 1260 12 1680 13 2520 14 5040 15 15120 16 20160 17 50400 18 55440 19 166320 20 332640 21 665280 22 2162160 23 3603600 24 4324320 25 8648640 26 17297280 27 32432400 28 43243200