# A005958 (b-file synthesized from sequence entry)
2 1
3 2
4 4
5 10
6 25
7 64
8 172
9 472
10 1319
11 3750
12 10796
13 31416
14 92276
15 273172
16 814246
17 2441688
18 7360877
19 22295746
20 67819576
21 207083944
22 634512581
23 1950301202
24 6011920720
25 18581123978
26 57568802820
27 178763375468
28 556255762692
29 1734248037856