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A060820 as a simple table

na(n)
15
225
361
4113
5181
6265
7365
8481
9613
10761
11925
121105
131301
141513
151741
161985
172245
182521
192813
203121
213445
223785
234141
244513
254901
265305
275725
286161
296613
307081
317565
328065
338581
349113
359661
3610225
3710805
3811401
3912013
4012641
4113285
4213945
4314621
4415313

[5,25,61,113,181,265,365,481,613,761,925,1105,
 1301,1513,1741,1985,2245,2521,2813,3121,3445,3785,
 4141,4513,4901,5305,5725,6161,6613,7081,7565,8065,
 8581,9113,9661,10225,10805,11401,12013,12641,
 13285,13945,14621,15313]