# A287424 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 6
5 20
6 77
7 351
8 1923
9 12191
10 89343
11 739070
12 6799093
13 68520840
14 748504768
15 8788177682
16 110193653493
17 1468070974840
18 20694573733399
19 307578336213268
20 4805384561510138
21 78708210391001097
22 1348365584613851292
23 24108682771968553916
24 449043803118089980878