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A144856 as a simple table

na(n)
121
293
3217
4381
5889
63937
724573
857337
9253921
10393213
11917497
121040257
131572861
143670009
154063201
1616252897
1716646017
1866584449
191073602561
204294434817
216442450941
2215032385529
2366571993057
2468718821377
25272730423169

[21,93,217,381,889,3937,24573,57337,253921,393213,
 917497,1040257,1572861,3670009,4063201,16252897,
 16646017,66584449,1073602561,4294434817,
 6442450941,15032385529,66571993057,68718821377,
 272730423169]