# A052315 (b-file synthesized from sequence entry)
1 1
2 4
3 17
4 83
5 432
6 2416
7 14093
8 85188
9 528234
10 3343420
11 21508182
12 140225532
13 924444270
14 6152191399
15 41275242100
16 278865583963
17 1895686831203
18 12956648332412
19 88984197144487
20 613773294727307
21 4250024962493357