# A001665 (b-file synthesized from sequence entry)
0 1
1 4
2 12
3 32
4 88
5 240
6 652
7 1744
8 4616
9 12208
10 32328
11 85408
12 224640
13 589024
14 1542944
15 4039256
16 10560552
17 27567488
18 71878068
19 187262944
20 487526944
21 1268269160
22 3296832292
23 8564411120
24 22235825104
25 57701041072
26 149657337872
27 387978891176
28 1005378745536
29 2604222063144
30 6743181213712
31 17454178002264