# A152333 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 24
5 120
6 640
7 4092
8 27504
9 223752
10 1941032
11 18688776
12 193458120
13 2192678402
14 26386639934
15 341945010834
16 4673722974460