# A221859 (b-file synthesized from sequence entry)
0 1
1 4
2 15
3 56
4 209
5 779
6 2898
7 10760
8 39882
9 147612
10 545721
11 2015721
12 7440251
13 27448008
14 101217076
15 373128151
16 1375167467
17 5067236766
18 18669118971
19 68774597447
20 253334948791
21 933111590565
22 3436767111783
23 12657552835178
24 46616152422035
25 171677402416052