# A148495 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 21
5 83
6 348
7 1499
8 6623
9 29805
10 136080
11 628537
12 2930993
13 13772875
14 65132877
15 309654749
16 1478735723
17 7088395315
18 34089167561
19 164401035964
20 794796779867
21 3850714202599
22 18691819399273
23 90885695919131
24 442583806441116
25 2158167279743194
26 10536761139563128
27 51500580609300347