# A122392 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 46
5 139
6 416
7 1248
8 3744
9 11232
10 33696
11 101088
12 303264
13 909792
14 2729376
15 8188128
16 24564384
17 73693152
18 221079456
19 663238368
20 1989715104
21 5969145312
22 17907435936
23 53722307808
24 161166923424
25 483500770272
26 1450502310816