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A159307 as a simple table

na(n)
01
16
2-206
3-4140
4124716
54755816
6-122371464
7-7639673616
8161459218320
915759163430496
10-257103196917984
11-39679794683308224
12446329942095824064
13117908103412902026880
14-696705377356050344064
15-403652886627048369133824
16107123200040172534149376

[1,6,-206,-4140,124716,4755816,-122371464,
 -7639673616,161459218320,15759163430496,
 -257103196917984,-39679794683308224,
 446329942095824064,117908103412902026880,
 -696705377356050344064,-403652886627048369133824,
 107123200040172534149376]