# A050686 (b-file synthesized from sequence entry)
1 1
2 1
3 18
4 18
5 252
6 252
7 3168
8 3168
9 37512
10 37512
11 427608
12 427608
13 4748472
14 4748472
15 51736248
16 51736248
17 555626232
18 555626232
19 5900636088
20 5900636088
21 62105724792
22 62105724792
23 648951523128
24 648951523128
25 6740563708152