# A151515 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 6
5 15
6 44
7 121
8 353
9 1005
10 2919
11 8398
12 24310
13 70064
14 202225
15 582365
16 1676889
17 4821924
18 13857720
19 39787804