# A018225 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 6
5 31
6 255
7 2788
8 37333
9 578799
10 10134071
11 197394232
12 4231417728
13 98991987830
14 2510081238264
15 68583045013542
16 2009094843480565
17 62824038815664719
18 2088829704241946181
19 73591470349452760456
20 2738742863175749456078