# A149118 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 9
4 32
5 103
6 345
7 1275
8 4410
9 16741
10 61731
11 233495
12 902378
13 3437487
14 13553036
15 52676569
16 208717276
17 828362597
18 3294044819
19 13255061489
20 53113955276
21 215179562527
22 870783523200
23 3541185265429
24 14454981038936
25 59025273287545
26 242367745510571
27 994814873513383
28 4100366928340036