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A022602 as a simple table

na(n)
01
1-7
221
3-42
484
5-175
6322
7-547
8931
9-1561
102527
11-3976
126167
13-9485
1414336
15-21280
1631304
17-45696
1865940
19-94122
20133371
21-187734
22262143
23-363265
24500381
25-685503
26933506
27-1263794
281702590
29-2283379
303047597

[1,-7,21,-42,84,-175,322,-547,931,-1561,2527,
 -3976,6167,-9485,14336,-21280,31304,-45696,65940,
 -94122,133371,-187734,262143,-363265,500381,
 -685503,933506,-1263794,1702590,-2283379,3047597]