# A353892 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 0
5 0
6 20
7 210
8 1960
9 18900
10 194880
11 2166780
12 26172080
13 342599400
14 4835694864
15 73208215080
16 1183011385920
17 20318534134080
18 369549843420384
19 7094851788127680
20 143377043010268800
21 3042204544957939200
22 67621161484919380800
23 1571319471977711258880