# A093419 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 6 5 5 6 10 7 35 8 140 9 126 10 1260 11 1155 12 13860 13 12870 14 12012 15 45045 16 360360 17 340340 18 2042040 19 1939938 20 369512 21 117572 22 2586584 23 7436429 24 178474296 25 171609900 26 1487285800 27 1434168450 28 40156716600 29 38818159380 30 1164544781400