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A301410 as a simple table

na(n)
01
1-1
21
3-1
41
50
6-3
710
8-26
960
10-127
11250
12-458
13766
14-1107
151146
16188
17-5782
1822658
19-66620
20170841
21-400001
22869124
23-1755912
243263352
25-5403598
267264938
27-4950248
28-13623003
2980819359
30-275474805
31775529946
32-1954651995
334537336510
34-9788453019
3519563409996

[1,-1,1,-1,1,0,-3,10,-26,60,-127,250,-458,766,
 -1107,1146,188,-5782,22658,-66620,170841,-400001,
 869124,-1755912,3263352,-5403598,7264938,-4950248,
 -13623003,80819359,-275474805,775529946,
 -1954651995,4537336510,-9788453019,19563409996]