# A102433 (b-file synthesized from sequence entry) 1 1 2 4 3 12 4 40 5 132 6 472 7 1727 8 6452 9 24330 10 92404 11 352743 12 1352116 13 5200339 14 20058347 15 77558811 16 300540260 17 1166803176 18 4537567732 19 17672631983 20 68923264512 21 269128937327 22 1052049481983 23 4116715363924 24 16123801841703