# A300793 (b-file synthesized from sequence entry)
1 1
2 3
3 13
4 75
5 561
6 5355
7 63405
8 894915
9 14511105
10 263544435
11 5284255725
12 116065424475
13 2778006733425
14 72093290744475
15 2017526711525325
16 60547198550713875
17 1938662110170410625
18 65941564342927147875
19 2374177441960545346125
20 90211614359319635056875