# A218532 (b-file synthesized from sequence entry)
1 2
2 3
3 5
4 10
5 21
6 44
7 92
8 216
9 446
10 1018
11 2356
12 5408
13 12559
14 29709
15 70446
16 169008
17 407539
18 988057
19 2415086
20 5927972