# A199883 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 4
5 9
6 20
7 48
8 113
9 262
10 591
11 1263
12 2505
13 4764
14 8479
15 14285
16 22871
17 35316
18 52755
19 76517
20 107826
21 148914
22 202715
23 270622