# A012702 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 -12
5 60
6 -570
7 3780
8 -36288
9 290304
10 -3077160
11 27976080
12 -325364952
13 3125330208
14 -38076353952
15 320524495200
16 -3277240862208
17 -12892686066816
18 851147013155904
19 -38579486635656576
20 1000229709289596288