# A148091 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 10
5 24
6 75
7 216
8 714
9 2207
10 7436
11 24191
12 86048
13 293747
14 1067294
15 3730715
16 13746151
17 49287908
18 185552315
19 679296274
20 2582590609
21 9579477462
22 36808351636
23 138548906824
24 538038570723
25 2047494127395
26 8001858907158
27 30725643664976
28 120983795801398
29 468789378026079
30 1857083738842685