# A168357 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 20
4 112
5 768
6 5984
7 50856
8 460180
9 4366076
10 42988488
11 436066232
12 4532973676
13 48095557700
14 519247705968
15 5690272928520
16 63172884082028
17 709373555125356
18 8046263496489260
19 92089662771965492
20 1062482514810065752