# A358954 (b-file synthesized from sequence entry)
0 1
1 4
2 36
3 384
4 4568
5 57920
6 768760
7 10543120
8 148247390
9 2125715618
10 30965114225
11 456956616284
12 6817011617601
13 102640570550600
14 1557716916728198
15 23804070258610024
16 365964582592739540
17 5656501536118793076
18 87846324474413129008
19 1370097609728212588634
20 21451062781643458337802