# A146637 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 7
7 21
8 49
9 223
10 1043
11 7899
12 74561
13 730567
14 8688119
15 134449641
16 2597702163
17 64827359403
18 1993658503781
19 73350618685271
20 3327101809889351