# A064319 (b-file synthesized from sequence entry) 1 1 2 2 3 2 4 3 5 6 6 12 7 4 8 12 9 72 10 864 11 5 12 20 13 240 14 17280 15 14929920 16 6 17 30 18 600 19 144000 20 2488320000 21 37150418534400000 22 7 23 42 24 1260 25 756000 26 108864000000 27 270888468480000000000 28 10063619980174622195712000000000000000 29 8 30 56