# A025234 (b-file synthesized from sequence entry)
0 1
1 0
2 4
3 8
4 28
5 83
6 255
7 778
8 2377
9 7259
10 22173
11 67721
12 206844
13 631764
14 1929609
15 5893632
16 18001012
17 54980764
18 167928588
19 512906847
20 1566579211
21 4784826786
22 14614369465
23 44636891651
24 136335139273
25 416410496177
26 1271848932360
27 3884627600872
28 11864877355729