# A249794 (b-file synthesized from sequence entry)
0 1
1 1
2 8
3 44
4 232
5 1253
6 6895
7 38376
8 215396
9 1217109
10 6914696
11 39458777
12 226006814
13 1298557455
14 7481167001
15 43200760775
16 249977853797
17 1449092483085
18 8413731049376
19 48922225054030
20 284830701327470
21 1660264158620798
22 9687938318036091
23 56586034949700662