# A149299 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 46
5 167
6 720
7 2915
8 12974
9 55630
10 253309
11 1124806
12 5206427
13 23665135
14 110878569
15 512404479
16 2423117125
17 11336431183
18 53998337998
19 255018739528
20 1221753464002
21 5812862975090
22 27979448361724
23 133913705411633
24 647076980439284
25 3112052367156549
26 15086374420291003
27 72848186260134898