# A148856 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 28
5 93
6 345
7 1247
8 4905
9 18621
10 75573
11 297895
12 1235431
13 5004478
14 21069953
15 87081849
16 370961528
17 1556555814
18 6694323743
19 28429384992
20 123233469423
21 528551018694
22 2306190887973
23 9973209794754
24 43756896008712
25 190541968507586
26 839978958124485
27 3679275247472375
28 16287097093699275