# A150073 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 18
4 65
5 240
6 918
7 3609
8 14571
9 59624
10 247322
11 1038351
12 4401989
13 18803632
14 80903679
15 350281242
16 1524630402
17 6667663326
18 29286656081
19 129132109006
20 571345532548
21 2535959521772
22 11288724438289
23 50384304361736
24 225426802809994
25 1010875691689569
26 4542536427012601
27 20452372960668591