# A203165 (b-file synthesized from sequence entry)
1 1
2 7
3 19
4 50
5 174
6 768
7 1056
8 2400
9 7776
10 32832
11 39744
12 86400
13 273024
14 1133568
15 1299456
16 2764800
17 8626176
18 35500032
19 39481344
20 82944000
21 256794624
22 1051066368
23 1146617856
24 2388787200
25 7357464576
26 30003167232
27 32296402944
28 66886041600