# A149367 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 45
5 160
6 678
7 2689
8 10987
9 46623
10 200648
11 853429
12 3708622
13 16347640
14 71949049
15 317419539
16 1419224447
17 6362428004
18 28500854794
19 128527458182
20 582669917201
21 2641128719409
22 12001433948192
23 54787460741349
24 250485402351848
25 1146059928297438
26 5259296181310155
27 24189261693161814