# A147492 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 5
8 13
9 29
10 115
11 371
12 1127
13 6493
14 42101
15 265099
16 2205911
17 20203737
18 188160663
19 2232930361
20 31949821401
21 512095816829
22 9852484817887
23 220067190717237