# A148574 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 6
4 20
5 49
6 172
7 484
8 1732
9 5194
10 19061
11 59840
12 222265
13 722995
14 2707778
15 9031024
16 34126550
17 116009638
18 440855651
19 1523827413
20 5816083375
21 20364473133
22 78075605101
23 276294402102
24 1062737326830
25 3796951739926
26 14643791215968
27 52733250282433
28 203923018220654
29 739335703065172
30 2865104006790009