# A143646 (b-file synthesized from sequence entry)
0 0
1 1
2 4
3 18
4 83
5 387
6 1815
7 8541
8 40276
9 190182
10 898844
11 4250780
12 20111394
13 95181166
14 450565602
15 2133227418
16 10101126723
17 47834649675
18 226540406571
19 1072931019393
20 5081776592061
21 24069823974879
22 114009427284309