# A020035 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 17
5 80
6 468
7 3197
8 25042
9 221209
10 2175217
11 23564850
12 278850730
13 3578584369
14 49503750432
15 734305631413
16 11626505830701
17 195712848150141
18 3490212458677514
19 65732334638426516
20 1303691303662125906