# A151280 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 47
5 150
6 495
7 1672
8 5698
9 19636
10 68470
11 240342
12 848258
13 3012899
14 10753669
15 38519879
16 138501666
17 499728140
18 1807946861
19 6557502077
20 23843549009
21 86880613032
22 317170036587
23 1160001218633
24 4249640363945
25 15591664759190
26 57285869534363
27 210757677563396
28 776332308628500
29 2862899274870651