# A150043 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 18
4 60
5 204
6 716
7 2560
8 9296
9 34128
10 126560
11 472864
12 1778016
13 6722880
14 25536768
15 97384128
16 372691968
17 1430618112
18 5506231808
19 21244025088
20 82137286400
21 318177976064
22 1234689470976
23 4798686523904
24 18676787597824
25 72786442978304
26 283997288733696
27 1109305183011840
28 4337384738945024