# A143342 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 40
4 374
5 3215
6 34298
7 326360
8 3710278
9 37289620
10 440121880
11 4577214736
12 55375589594
13 589530372890
14 7258264793564
15 78597770766160
16 980423896907046
17 10754940952651740
18 135521929778850952
19 1501817992511869280