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A361917 as a simple table

na(n)
01
11
21
3-5
4-23
5-59
6961
77351
829905
9-877463
10-9450719
11-52724429
122282907001
1331742360365
14225092745697
15-12992587010129
16-221436656404319
17-1905297800257199
18137972958868569025
192784953660339878507
2028177036295775415561
21-2459373614334806266859

[1,1,1,-5,-23,-59,961,7351,29905,-877463,-9450719,
 -52724429,2282907001,31742360365,225092745697,
 -12992587010129,-221436656404319,
 -1905297800257199,137972958868569025,
 2784953660339878507,28177036295775415561,
 -2459373614334806266859]