# A047013 (b-file synthesized from sequence entry)
1 1
2 1
3 3
4 12
5 46
6 172
7 651
8 2478
9 9457
10 36228
11 139249
12 536687
13 2073540
14 8028826
15 31147792
16 121045410
17 471128566
18 1836259944
19 7165975248
20 27997121205
21 109497724812
22 428659516902
23 1679585156639
24 6586339566777
25 25847132064141