# A013250 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 -3
5 40
6 -250
7 840
8 -4515
9 87120
10 -949500
11 4360400
12 -24799775
13 1013539800
14 -16719504750
15 82697979000
16 -246429558375
17 40173677908000
18 -928344422395000
19 3990578889492000
20 32523853181113125