# A049159 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 31
5 111
6 415
7 1591
8 6229
9 24773
10 99795
11 406225
12 1668071
13 6900295
14 28725759
15 120243143
16 505751889
17 2136282633
18 9057752963
19 38534668209
20 164439768551
21 703658271103
22 3018625303199
23 12979441615631
24 55926921211749