# A377390 (b-file synthesized from sequence entry)
0 1
1 0
2 4
3 6
4 232
5 1380
6 46308
7 593880
8 20639456
9 434113344
10 16557009840
11 490894572960
12 20995513516800
13 801146038080960
14 38632110899469696
15 1791609186067646400
16 97167945389675212800
17 5275541489312858803200
18 319879838094553691744256
19 19820894989178283188198400