# A327009 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 8 5 24 6 48 7 120 8 360 9 1088 10 3135 11 9999 12 31328 13 103040 14 342224 15 1151328 16 3920399 17 13571855 18 47416995 19 166642280 20 590733024 21 2105524995 22 7553695743 23 27244473480 24 98709700760 25 359212031648 26 1312529961648