# A235359 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 12
4 72
5 768
6 7776
7 118656
8 1696896
9 33623424
10 622245888
11 15149680128
12 344372041728
13 9939463852032
14 268073031942144
15 8944566120382464
16 279256558618312704
17 10572693702605438976
18 375117006060927516672
19 15884838808477768876032
20 631358485413914656899072