# A024284 (b-file synthesized from sequence entry)
0 0
1 1
2 -8
3 144
4 -4960
5 270592
6 -21137408
7 2224725888
8 -302627860480
9 51593676611584
10 -10764002330353664
11 2695943436451381248
12 -797890777835475828736
13 275364493447731494551552
14 -109570026970391274539712512
15 49780238650264282725443174400