# A148720 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 7
4 24
5 76
6 277
7 1012
8 3900
9 15298
10 61744
11 252844
12 1055394
13 4456946
14 19066780
15 82383168
16 359267491
17 1579448039
18 6994656090
19 31175776248
20 139782570970
21 630064954347
22 2853843406073
23 12983914841969
24 59312608158319
25 271967699137691
26 1251392188397235
27 5776438662674473
28 26743675660270307