# A080833 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 19
4 145
5 1401
6 16051
7 213403
8 3223809
9 54514225
10 1019601091
11 20890209891
12 465156779473
13 11181638663209
14 288536019179955
15 7953590111627371
16 233211718410856321
17 7246720953253750113
18 237849724555558441219
19 8221578401608012672435
20 298505383888840158941841