# A104442 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 10
5 20
6 56
7 116
8 320
9 736
10 1872
11 4176
12 12712
13 28368
14 73592
15 177272
16 487304
17 1130712
18 3209792
19 7494720
20 20419744
21 49706280
22 129803592
23 311179624