# A199137 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 30
5 97
6 336
7 1153
8 4081
9 14552
10 52609
11 191657
12 704385
13 2604476
14 9687433
15 36207241
16 135920489
17 512182805
18 1936656361
19 7345211322
20 27935373368
21 106509551719
22 407015199144
23 1558603221623
24 5979839952471
25 22983021033071
26 88477003979994
27 341120527468590