# A006573 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 2
4 8
5 16
6 384
7 768
8 3072
9 6144
10 1474560
11 589824
12 11796480
13 7864320
14 11890851840
15 23781703680
16 95126814720
17 27179089920
18 91321742131200
19 7305739370496
20 730573937049600
21 1461147874099200
22 385743038762188800
23 771486077524377600