# A148243 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 13
5 36
6 115
7 358
8 1162
9 3846
10 13131
11 45774
12 160487
13 570699
14 2038537
15 7365489
16 26832702
17 98727890
18 365178878
19 1358061230
20 5072922935
21 19034627200
22 71768522621
23 271873506868
24 1034051230202
25 3945442312974
26 15099285947998
27 57945734250270
28 223015892379970
29 860798756426298
30 3331476814130518