# A069732 (b-file synthesized from sequence entry)
1 0
2 0
3 2
4 7
5 40
6 239
7 1549
8 10396
9 71467
10 498598
11 3520015
12 25087426
13 180249182
14 1304148015
15 9494015372
16 69492950976
17 511147940104
18 3776180492129
19 28007532925171
20 208474866181148