# A150953 (b-file synthesized from sequence entry)
0 1
1 2
2 9
3 35
4 157
5 681
6 3184
7 14449
8 68514
9 318868
10 1528662
11 7224945
12 34859918
13 166473286
14 807330834
15 3883821511
16 18902679334
17 91430966947
18 446307098244
19 2167781051280
20 10605760372222
21 51682964710713
22 253340097702432
23 1237816223983285
24 6077025738208497
25 29756488885651326
26 146285190846706373