# A171978 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 7
5 22
6 37
7 84
8 172
9 454
10 745
11 2904
12 4722
13 10464
14 38546
15 88769
16 147439
17 475153
18 785894
19 3140342
20 10412267
21 19169464
22 32132160
23 125087460
24 224341028