# A026980 (b-file synthesized from sequence entry)
0 1
1 3
2 8
3 25
4 60
5 147
6 336
7 882
8 1960
9 4631
10 10104
11 25207
12 54292
13 125895
14 268576
15 653191
16 1383228
17 3172981
18 6679960
19 15996204
20 33515856
21 76350225
22 159339600
23 377580850
24 785368168
25 1780545051
26 3692982328
27 8684805392
28 17968562880