# A367972 (b-file synthesized from sequence entry)
0 1
1 3
2 14
3 82
4 568
5 4504
6 40016
7 392368
8 4198784
9 48616320
10 604921600
11 8043848960
12 113785080832
13 1705669278720
14 27007064393728
15 450422751508480
16 7893590619881472
17 145052304752934912
18 2789743827826573312
19 56063169473909817344