# A081057 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 18
4 58
5 186
6 602
7 1946
8 6298
9 20378
10 65946
11 213402
12 690586
13 2234778
14 7231898
15 23402906
16 75733402
17 245078426
18 793090458
19 2566494618
20 8305351066
21 26876680602
22 86974765466
23 281456253338
24 910811568538
25 2947448150426
26 9538142575002
27 30866077751706