# A148753 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 7
4 28
5 77
6 326
7 1028
8 4508
9 15255
10 68632
11 243837
12 1114866
13 4107946
14 19004015
15 71988788
16 336043828
17 1301048142
18 6116392715
19 24103744170
20 113963361244
21 455754834422
22 2164963692051
23 8765929019818
24 41804416460392
25 171069967405773
26 818553601362454
27 3380530240851678
28 16222030587174635