# A129772 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 16
4 48
5 140
6 420
7 1248
8 3744
9 11200
10 33600
11 100704
12 302112
13 906056
14 2718168
15 8153664
16 24460992
17 73380480
18 220141440
19 660416832
20 1981250496
21 5943729088
22 17831187264
23 53493494592
24 160480483776
25 481441249920
26 1444323749760