# A309801 (b-file synthesized from sequence entry)
1 1
2 4
3 9
4 81
5 244
6 793
7 2316
8 65536
9 262145
10 1049600
11 4196353
12 17308657
13 68703188
14 273234809
15 1088123500
16 152587890625
17 762939453126
18 3814697527769
19 19073486852414
20 95370918425026
21 476847618556329
22 2384217176269538
23 11921023106645561
24 59886119752101281