# A183159 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 38
5 90
6 220
7 460
8 1018
9 2022
10 4304
11 8376
12 17566
13 33922
14 70756
15 136260
16 283682
17 545790
18 1135576
19 2184112
20 4543366
21 8737626
22 18174764
23 34951932
24 72700618
25 139809430
26 290804320
27 559239720
28 1163219438