# A373532 (b-file synthesized from sequence entry) 1 1 2 2 3 12 4 120 5 240 6 3276 7 2520 8 10920 9 21840 10 32760 11 65520 12 622440 13 600600 14 900900 15 3636360 16 1801800 17 3603600 18 4455360 19 22407840 20 8910720 21 17821440 22 51351300 23 46060560 24 69090840 25 92121120 26 126977760 27 138181680 28 380933280 29 245044800 30 414545040 31 490089600 32 507911040