# A153944 (b-file synthesized from sequence entry)
0 1
1 2
2 2
3 3
4 8
5 6
6 28
7 164
8 366
9 1829
10 16995
11 53701
12 369189
13 5605587
14 28526549
15 299788077
16 7021649770
17 53533022280