# A049775 (b-file synthesized from sequence entry)
2 2
3 7
4 26
5 100
6 392
7 1552
8 6176
9 24640
10 98432
11 393472
12 1573376
13 6292480
14 25167872
15 100667392
16 402661376
17 1610629120
18 6442483712
19 25769869312
20 103079346176
21 412317122560
22 1649267965952
23 6597070815232
24 26388281163776