# A074431 (b-file synthesized from sequence entry)
1 0
2 0
3 1
4 9
5 60
6 270
7 1157
8 5616
9 29160
10 157464
11 883872
12 5038848
13 28421280
14 158130514
15 877515379
16 4897760256
17 27554100480
18 156116108160
19 889046473445
20 5077739844402
21 29045467518171
22 166351313967709
23 954240788994048
24 5484237660094464
25 31581615565250142