# A149846 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 12
4 38
5 118
6 424
7 1544
8 5668
9 22186
10 86962
11 347260
12 1426428
13 5869950
14 24589692
15 104252754
16 444133962
17 1916625390
18 8318626668
19 36335194794
20 159998657938
21 707382646426
22 3146397539508
23 14064764511358
24 63107673236226
25 284521869849658
26 1287188819030996
27 5843899644335638
28 26625968697335426