# A009463 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 4
4 -6
5 -15
6 255
7 -2984
8 27972
9 -270715
10 2655315
11 -27141996
12 290213814
13 -3244179419
14 37924786627
15 -461313190168
16 5805782143080
17 -74822106476983
18 970988704302663
19 -12286902933891708
20 140375955767835090