# A243054 (b-file synthesized from sequence entry)
0 1
1 2
2 9
3 75
4 735
5 12705
6 195195
7 4339335
8 92147055
9 2565568005
10 93810551835
11 3108687597015
12 137283655493985
13 6237130402307805
14 281279368630905645
15 14449909890829548135
16 863612699645536185345
17 56721430329549272852565
18 3577295631461912614989735
19 263253771961188946371949515