# A147081 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 5
9 11
10 23
11 38
12 81
13 220
14 567
15 1681
16 5209
17 18445
18 63999
19 259065
20 1109285
21 5269124
22 26433601
23 148185912
24 862407722