# A006759 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 3
5 17
6 131
7 915
8 6553
9 47026
10 341888
11 2505449
12 18534827
13 138224058
14 1038594326
15 7856087894
16 59782042225
17 457359506070
18 3515816578512
19 27143401299351
20 210372490707568