# A347949 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 2
4 6
5 64
6 170
7 2988
8 14616
9 180192
10 1934712
11 21673200
12 300266736
13 4220710272
14 61785461712
15 1003589762784
16 17448621367680
17 327598207658496
18 6279739240655232
19 134169095009652480
20 2817563310900129024
21 64570676279407718400
22 1547773850801172960000
23 38824156236466815920640