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A121721 as a simple table

na(n)
11
20
32
4-1
52
625
7-9
81
925
10117
11-36
12-7
1324
14117
15356
16-100
17-34
1816
19116
20356
21850
22-225
23-98
24-11
25108
26355
27850
281737
29-441
30-223
31-75
3281
33347
34849
351737
363185
37-784
38-439
39-200
4017
41320
42841
431736
443185
455392
46-1296
47-782
48-416
49-108
50256
51814
521728
533184
545392
558586
56-2025
57-1294
58-759
59-324
60131
61750

[1,0,2,-1,2,25,-9,1,25,117,-36,-7,24,117,356,-100,
 -34,16,116,356,850,-225,-98,-11,108,355,850,1737,
 -441,-223,-75,81,347,849,1737,3185,-784,-439,-200,
 17,320,841,1736,3185,5392,-1296,-782,-416,-108,
 256,814,1728,3184,5392,8586,-2025,-1294,-759,-324,
 131,750]