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A051722 as a simple table

na(n)
0-1
1-1
2-3
3-1
40
51
649
78
827
9125
10121
113
12169
1349
14125
15352
16289
17351
18361
19125
20147
212057
22529
23152
243125
25169
262673
271127
28841
291875
3012493
31128
32121
338381
346125
35837
362738
373971
388619
391000
401681
411813
4235131
431573
443375
4521689
462209
474128
4826411

[-1,-1,-3,-1,0,1,49,8,27,125,121,3,169,49,125,352,
 289,351,361,125,147,2057,529,152,3125,169,2673,
 1127,841,1875,12493,128,121,8381,6125,837,2738,
 3971,8619,1000,1681,1813,35131,1573,3375,21689,
 2209,4128,26411]