# A067295 (b-file synthesized from sequence entry)
0 14
1 28
2 76
3 227
4 715
5 2333
6 7810
7 26663
8 92456
9 324700
10 1152464
11 4127294
12 14895145
13 54115895
14 197764350
15 726473055
16 2680979820
17 9934884960
18 36953107320
19 137913387450
20 516295313430
21 1938260223354