# A149930 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 48
5 171
6 637
7 2428
8 9550
9 38349
10 156705
11 650514
12 2730685
13 11586035
14 49633476
15 214245357
16 931290307
17 4073517547
18 17914555800
19 79177186936
20 351493613879
21 1566615341461
22 7008105335834
23 31454517640160
24 141606919092096
25 639300738693485
26 2893656057013955
27 13128807209968934