# A373741 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 9
4 39
5 150
6 1365
7 13545
8 105945
9 918540
10 10603845
11 127806525
12 1468823895
13 18253765530
14 257397445305
15 3770163121725
16 55637459903025
17 866703333295800
18 14468243658093225
19 250223925107581425
20 4426399346291497575
21 81488489549760042750