# A080877 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 3
4 8
5 14
6 40
7 72
8 208
9 376
10 1088
11 1968
12 5696
13 10304
14 29824
15 53952
16 156160
17 282496
18 817664
19 1479168
20 4281344
21 7745024
22 22417408
23 40553472
24 117379072
25 212340736
26 614604800
27 1111830528
28 3218112512
29 5821620224
30 16850255872