# A149166 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 9
4 42
5 120
6 570
7 1825
8 8890
9 30534
10 149418
11 536896
12 2650062
13 9848282
14 48696782
15 185458037
16 920584716
17 3576385528
18 17767869592
19 70107220264
20 348996559758
21 1395354752334
22 6949384790858
23 28086919632832
24 140041190373276
25 571375438865004
26 2849662081018354
27 11720152721264588
28 58492355525303946