# A137744 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 0
4 1
5 4
6 13
7 40
8 119
9 348
10 1014
11 2966
12 8726
13 25820
14 76823
15 229814
16 691186
17 2089850
18 6351448
19 19398726
20 59525641
21 183462778