# A373908 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 9
4 38
5 136
6 452
7 1495
8 5031
9 17114
10 58282
11 198032
12 671856
13 2278870
14 7731892
15 26238839
16 89047335
17 302191369
18 1025487338
19 3479970844
20 11809261583
21 40074827170
22 135994407483
23 461498426696
24 1566098800484
25 5314568565096
26 18035031128780
27 61202027710656