# A208988 (b-file synthesized from sequence entry)
1 1
2 2
3 5
4 16
5 59
6 253
7 1111
8 5067
9 23483
10 110772
11 529201
12 2557073
13 12471501
14 61328336
15 303723367
16 1513583006
17 7584498891
18 38192683192
19 193171464383
20 980903632155