# A149155 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 9
4 39
5 112
6 512
7 1660
8 7778
9 27188
10 129401
11 475825
12 2288259
13 8728352
14 42284402
15 165826745
16 807712214
17 3237235537
18 15833338030
19 64579379484
20 316882110960
21 1311217629144
22 6450625830056
23 27015741085305
24 133185518215086
25 563537265001788
26 2783016272151599
27 11879828894712115
28 58753259096839334