# A049174 (b-file synthesized from sequence entry)
1 1
2 1
3 3
4 9
5 31
6 111
7 415
8 1589
9 6209
10 24617
11 98755
12 399853
13 1631223
14 6695623
15 27622559
16 114432337
17 475698713
18 1983128001
19 8286708835
20 34692334537
21 145457648071
22 610578202095
23 2565147448607
24 10782647145589
25 45338223018217