# A364422 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 12
4 120
5 1200
6 14400
7 191520
8 2862720
9 47174400
10 852768000
11 16765056000
12 356377190400
13 8144943206400
14 199202395392000
15 5191467240960000
16 143634952581120000
17 4204936774950912000
18 129865748246986752000
19 4219868533182382080000
20 143918318293689139200000