# A059439 (b-file synthesized from sequence entry)
0 0
1 0
2 1
3 2
4 7
5 32
6 177
7 1142
8 8411
9 69692
10 642581
11 6534978
12 72754927
13 880877928
14 11530686953
15 162331760494
16 2446380427331
17 39300220067668
18 670480457586813
19 12106985274788506
20 230691361507912471
21 4625811718758963136