# A135218 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 25
4 25
5 745
6 3145
7 40945
8 353425
9 4200625
10 49949425
11 666656425
12 9492440425
13 145513569625
14 2378864325625
15 41355134658625
16 761412592638625
17 14800232282598625
18 302834714220150625