# A216793 (b-file synthesized from sequence entry) 1 1 2 6 3 24 4 28 5 120 6 496 7 672 8 4320 9 4680 10 8128 11 26208 12 30240 13 32760 14 174592 15 199584 16 293760 17 435708 18 523776 19 2142720 20 2178540 21 8910720 22 17428320 23 20427264 24 23569920 25 33550336 26 45532800 27 91963648 28 142990848 29 459818240 30 1379454720 31 1476304896 32 6039429120