# A089179 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 20
5 85
6 402
7 2464
8 15752
9 119655
10 976190
11 9331894
12 91769988
13 1077214879
14 12570658310
15 168390947820
16 2337860163248
17 35513649943201
18 544140329564898
19 9660558198790510
20 166372364728477220