# A024281 (b-file synthesized from sequence entry)
0 0
1 1
2 8
3 76
4 -2752
5 -553904
6 -77878912
7 -11370511424
8 -1778864822272
9 -282582967817984
10 -36606453394757632
11 2075368674171759616
12 5791517230149348343808
13 4398620127304280971595776