# A150070 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 18
4 64
5 220
6 782
7 2824
8 10328
9 38306
10 142388
11 533832
12 2011048
13 7609034
14 28938148
15 110276428
16 421716538
17 1616589438
18 6211475088
19 23925481704
20 92285891638
21 356644978016
22 1380284689858
23 5349558200316
24 20763135142878
25 80668088650424
26 313779804455788
27 1221721443853960
28 4761378554236090