# A119921 (b-file synthesized from sequence entry)
1 2
2 12
3 72
4 336
5 1632
6 6720
7 29568
8 120576
9 499200
10 2012160
11 8214528
12 32894976
13 132882432
14 532070400
15 2136637440
16 8551464960
17 34282536960
18 137135652864
19 549148164096
20 2196721631232
21 8791208755200
22 35166005231616