# A180890 (b-file synthesized from sequence entry)
1 1
2 0
3 2
4 6
5 20
6 90
7 550
8 3512
9 25378
10 200558
11 1778156
12 17016488
13 177741892
14 1984308356
15 23873823014
16 304944376412
17 4155112842840