# A338437 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 9
4 32
5 300
6 864
7 17612
8 74752
9 1152792
10 6470400
11 220057992
12 719622144
13 40754156352
14 192835098624
15 4787867880000
16 55181218873344
17 3071730630989952
18 11004144881762304
19 1179255538492239744
20 5720352215040000000
21 253837962769406045184
22 3262870639485701849088