# A091530 (b-file synthesized from sequence entry)
1 1
2 4
3 16
4 73
5 388
6 2396
7 17024
8 137544
9 1248816
10 12603288
11 140018688
12 1698063552
13 22318009344
14 315942698880
15 4791898275840
16 77510315197440
17 1331759355586560
18 24220225133061120
19 464796175236710400
20 9385769913543475200
21 198936154022512435200
22 4415822707430415052800