# A212696 (b-file synthesized from sequence entry)
0 1
1 0
2 3
3 4
4 25
5 66
6 287
7 960
8 3789
9 13810
10 53240
11 200652
12 771641
13 2952054
14 11386065
15 43910288
16 170007429
17 658979586
18 2560258550
19 9960335060
20 38811668868
21 151418146704
22 591464244882
23 2312774560296
24 9052560751725
25 35464735083726
26 139054217427702
27 545635715465596