# A148700 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 7
4 23
5 69
6 241
7 815
8 2973
9 10765
10 40599
11 153519
12 594441
13 2315819
14 9159005
15 36470431
16 146745519
17 594261517
18 2425275509
19 9954790549
20 41110526691
21 170626390065
22 711716332495
23 2981638200405
24 12543716384153
25 52971343747061
26 224502013317731
27 954637799193723
28 4072108059395579