# A057545 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 3
4 6
5 6
6 24
7 72
8 144
9 147
10 588
11 672
12 2136
13 10152
14 11520
15 29484
16 117936
17 270576
18 656352
19 2062368
20 4040160