# A073279 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 5
4 34
5 250
6 2058
7 18661
8 185695
9 2017527
10 23804069
11 303413813
12 4157895295
13 60989187252
14 953766105164
15 15844435971349
16 278704524938621
17 5175632136205088
18 101198102131888304
19 2078318050691940125
20 44731639502987747576
21 1006917859088311808499