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A274447 as a simple table

na(n)
01
11
21
3-1
4-1
513
6-47
7-73
82447
9-16811
10-15551
111726511
12-18994849
1310979677
142983409137
15-48421103257
16135002366063
17778870772857
18-232033147779359
191305952009204319
2058740282660173759
21-1862057132555380307
2216905219421196907793
23527257187244811805207

[1,1,1,-1,-1,13,-47,-73,2447,-16811,-15551,
 1726511,-18994849,10979677,2983409137,
 -48421103257,135002366063,778870772857,
 -232033147779359,1305952009204319,
 58740282660173759,-1862057132555380307,
 16905219421196907793,527257187244811805207]