# A221145 (b-file synthesized from sequence entry)
1 1
2 0
3 0
4 8
5 30
6 144
7 1120
8 9120
9 80892
10 808640
11 8908416
12 106889760
13 1389405160
14 19452003648
15 291782125440
16 4668506495744
17 79364583206160
18 1428562661736960
19 27142690917071872
20 542853814698737280
21 11399930105272855776
22 250798462399704792320