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A022699 as a simple table

na(n)
01
1-7
214
3-7
449
5-203
6217
7-295
81365
9-2667
104214
11-8519
1216842
13-38570
1469012
15-104433
16240758
17-493374
18786835
19-1434601
202842567
21-5272206
229205546
23-16034312
2429916572
25-55466005
2695595395
27-163656780

[1,-7,14,-7,49,-203,217,-295,1365,-2667,4214,
 -8519,16842,-38570,69012,-104433,240758,-493374,
 786835,-1434601,2842567,-5272206,9205546,
 -16034312,29916572,-55466005,95595395,-163656780]