# A183120 (b-file synthesized from sequence entry)
0 0
1 1
2 3
3 7
4 19
5 55
6 159
7 471
8 1403
9 4199
10 12583
11 37735
12 113187
13 339543
14 1018607
15 3055799
16 9167371
17 27502087
18 82506231
19 247518663
20 742555955
21 2227667831
22 6683003455
23 20049010327
24 60147030939
25 180441092775
26 541323278279
27 1623969834791
28 4871909504323