# A359335 (b-file synthesized from sequence entry) 0 1 1 3 2 14 3 84 4 360 5 2160 6 10080 7 60480 8 249984 9 1499904 10 6999552 11 41997312 12 179988480 13 1079930880 14 5039677440 15 30238064640 16 122903101440 17 737418608640 18 3441286840320 19 20647721041920 20 88490233036800 21 530941398220800 22 2477726525030400 23 14866359150182400