# A357296 (b-file synthesized from sequence entry)
1 1
2 3
3 7
4 31
5 121
6 851
7 5041
8 43261
9 369601
10 3748249
11 39916801
12 490801081
13 6227020801
14 87861842641
15 1310800947457
16 21018206008801
17 355687428096001
18 6419518510204801
19 121645100408832001
20 2435836129700029057
21 51102829650622464001
22 1124549558817839481601