# A024246 (b-file synthesized from sequence entry)
0 0
1 1
2 4
3 4
4 -480
5 -12208
6 87488
7 27536192
8 1208587264
9 -78798149376
10 -18257785424896
11 -819996200344576
12 272839221776048128
13 64613626344768458752
14 380326723619536551936
15 -3364767702453136892805120