# A121553 (b-file synthesized from sequence entry)
1 1
2 4
3 20
4 122
5 874
6 7164
7 65988
8 674064
9 7558416
10 92276640
11 1218255840
12 17293495680
13 262656570240
14 4250077896960
15 72992067321600
16 1326101675673600
17 25410150701107200
18 512158576546713600
19 10832221231772774400