# A153909 (b-file synthesized from sequence entry)
0 1
1 2
2 3
3 10
4 29
5 170
6 866
7 8938
8 80759
9 1473212
10 23518209
11 758000366
12 21390884981
13 1218501715162
14 60770817102548
15 6118061305466866
16 539278173702963911
17 95952596838569547200
18 14947904300936965181323
19 4700556597989635565249354