# A189075 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 8
5 16
6 31
7 60
8 114
9 215
10 402
11 7464
12 1375
13 2520
14 4593
15 8329
16 15036
17 27027
18 48389
19 86314
20 153432