# A025568 (b-file synthesized from sequence entry)
1 1
2 5
3 19
4 65
5 211
6 665
7 2058
8 6294
9 19095
10 57607
11 173096
12 518596
13 1550367
14 4627455
15 13795176
16 41088456
17 122297643
18 363828663
19 1081966875
20 3216725841
21 9561635853
22 28418162003
23 84455354206
24 250982289650
25 745860104145
26 2216567725281