# A065237 (b-file synthesized from sequence entry)
0 1
1 0
2 4
3 4
4 28
5 64
6 268
7 844
8 3100
9 10876
10 39244
11 142432
12 518380
13 1906012
14 7012660
15 25980940
16 96407356
17 359260936
18 1341482740
19 5023006444
20 18844637356