# A036052 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 1
4 2
5 2
6 6
7 10
8 60
9 144
10 348
11 8526
12 8930
13 322560
14 210540
15 7296
16 7001280
17 3325069440
18 176880000
19 44528400
20 6398154000
21 74839427712000
22 222108480000
23 52321920
24 1864464000
25 5066300010240
26 1338148188
27 91406407293961987500