# A149289 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 44
5 168
6 684
7 2917
8 12434
9 54952
10 244134
11 1100482
12 5016090
13 23007212
14 106468234
15 495348425
16 2317147904
17 10893890888
18 51410034690
19 243569360712
20 1157680823330
21 5518485716846
22 26378212854558
23 126380662190358
24 606859223002138
25 2919830896866662
26 14073944474518660
27 67953617541129074