# A024428 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 4
5 8
6 18
7 42
8 102
9 260
10 684
11 1860
12 5216
13 15020
14 44388
15 134336
16 415672
17 1313696
18 4234904
19 13911528
20 46525992
21 158279872
22 547327904
23 1922455440
24 6854491840
25 24794405328
26 90940138256
27 338037825952
28 1272862982272
29 4853075024192