# A052201 (b-file synthesized from sequence entry)
1 4
2 15
3 48
4 175
5 816
6 4851
7 34960
8 292743
9 2774040
10 29251651
11 339184776
12 4285584615
13 58571107168
14 860622082035
15 13525670637216
16 226358825764711
17 4018390654376520
18 75413358213752643
19 1491684815796629080
20 31014754853346045831
21 676190458445520562896