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A274398 as a simple table

na(n)
11
213
3-83
4649
5-59
62089
7-7379
88829
9-410479
1084273
11-4091
122032897
13-867947
14951417
15-47224023
162228469
17-262139
1819669687769
19-1048571
201461748549
21-1500199283
22746586657
23-16777211
24747004180629
25-6777994779
267113541809
27-13667368865299
2829908738140693

[1,13,-83,649,-59,2089,-7379,8829,-410479,84273,
 -4091,2032897,-867947,951417,-47224023,2228469,
 -262139,19669687769,-1048571,1461748549,
 -1500199283,746586657,-16777211,747004180629,
 -6777994779,7113541809,-13667368865299,
 29908738140693]