# A180266 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 10 4 50 5 238 6 1092 7 4884 8 21450 9 92950 10 398684 11 1696396 12 7171892 13 30161740 14 126293000 15 526864680 16 2191034970 17 9086921190 18 37596989100 19 155232577500 20 639749274780 21 2632212288420 22 10814090022840 23 44369043365400