# A148977 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 32
5 109
6 419
7 1588
8 6394
9 25551
10 106210
11 438283
12 1863689
13 7875060
14 34040384
15 146360355
16 640715615
17 2791465710
18 12343656221
19 54346670390
20 242277534379
21 1075846812440
22 4828439923487
23 21592775822014
24 97458223274562
25 438426895287873
26 1988375049359820
27 8990333320807414
28 40943071427724043