# A221783 (b-file synthesized from sequence entry)
1 0
2 3
3 5
4 16
5 41
6 105
7 288
8 735
9 1981
10 5156
11 13685
12 35973
13 94940
14 250271
15 659721
16 1739740
17 4585933
18 12092245
19 31878636
20 84050611
21 221594145
22 584232168
23 1540316025