# A147070 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 3
8 9
9 19
10 61
11 211
12 741
13 3813
14 22505
15 147447
16 1175399
17 10583799
18 109540847
19 1364336983
20 19785643957
21 336137809321
22 6744593577357
23 157257981066897