# A000373 (b-file synthesized from sequence entry)
1 0
2 0
3 1
4 8
5 44
6 214
7 1000
8 4592
9 20888
10 94846
11 434973
12 2042836
13 9979086
14 51460622
15 283839957
16 1688139424
17 10859199656
18 75338888918
19 560740210491
20 4445766353604
21 37329808482989
22 330143634313064
23 3064464030121369