# A001796 (b-file synthesized from sequence entry)
0 1
1 3
2 27
3 143
4 3315
5 20349
6 260015
7 1710855
8 92116035
9 631165425
10 8775943605
11 61750730457
12 1755702867191
13 12587970424449
14 181858466731095
15 1322239639929719
16 154702037871777123
17 1137023085979691001
18 16789716964765636633