# A118397 (b-file synthesized from sequence entry)
0 1
1 2
2 7
3 20
4 73
5 254
6 895
7 3080
8 10801
9 38426
10 138775
11 504284
12 1838137
13 6705494
14 24464719
15 89204624
16 324981985
17 1183034546
18 4305313447
19 15672486692
20 57100841641
21 208309692974
22 761141694367
23 2785955603096
24 10215141094417