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A277197 as a simple table

na(n)
01
11
23
3-1
413
5-3
615
7-23
883
9-15
10195
11-235
12415
13-345
14105
15-199
16619
17-105
186225
19-6505
2020005
21-17625
226825
23-9373
2415673
25-12075
2643575
27-46865
2821665
29-20895
301155
31-2297
326917
33-1155
34324975
35-328055
363541055
37-3415125
381525125
39-1652903
404960403
41-4318125
4252513125
43-53137385
4424787385
45-24604125
46525525
47-727507
481212607
49-929775
5057598275

[1,1,3,-1,13,-3,15,-23,83,-15,195,-235,415,-345,
 105,-199,619,-105,6225,-6505,20005,-17625,6825,
 -9373,15673,-12075,43575,-46865,21665,-20895,1155,
 -2297,6917,-1155,324975,-328055,3541055,-3415125,
 1525125,-1652903,4960403,-4318125,52513125,
 -53137385,24787385,-24604125,525525,-727507,
 1212607,-929775,57598275]