# A204573 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 1
5 4
6 16
7 121
8 400
9 1600
10 11881
11 39204
12 156816
13 1164241
14 3841600
15 15366400
16 114083761
17 376437604
18 1505750416
19 11179044361
20 36887043600
21 147548174400
22 1095432263641
23 3614553835204
24 14458215340816
25 107341182792481
26 354189388806400
27 1416757555225600