# A149403 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 52
5 170
6 792
7 2958
8 14057
9 54619
10 264029
11 1068087
12 5208579
13 21555125
14 105790375
15 446084237
16 2198685109
17 9399635429
18 46473502878
19 200903485754
20 995565199085
21 4342682420690
22 21556860426720
23 94738071265023
24 470894637973974
25 2082599114595994
26 10362169084078158
27 46076752691587189