# A056281 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 0
5 1
6 15
7 140
8 1050
9 6951
10 42524
11 246730
12 1379385
13 7508501
14 40074895
15 210766919
16 1096189500
17 5652751651
18 28958088579
19 147589284710
20 749206047975
21 3791262568261
22 19137821665325
23 96416888184100