# A055551 (b-file synthesized from sequence entry)
1 0
2 0
3 1
4 12
5 36
6 114
7 375
8 1071
9 2939
10 7706
11 20417
12 53332
13 139597
14 364217
15 957111
16 2526795
17 6725234
18 18069359
19 48961462