# A067988 (b-file synthesized from sequence entry)
0 1
1 3
2 10
3 25
4 60
5 133
6 284
7 585
8 1175
9 2310
10 4464
11 8502
12 15995
13 29775
14 54920
15 100487
16 182556
17 329555
18 591550
19 1056405
20 1877821
21 3323868
22 5860800
23 10297500
24 18033925
25 31487643
26 54824854
27 95211205
28 164948700