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A281335 as a simple table

na(n)
225
316
425
52312
616
77136
827
972646
1025
114617
12169
13384
144119
153875
16289
17182585
18128
19556875
20451
2149
22529
231012985
24679
2572420352
2642752
27585903
28841
2964
30961
31118375
321285
332944
34179503
354624625
361369

[25,16,25,2312,16,7136,27,72646,25,4617,169,384,
 4119,3875,289,182585,128,556875,451,49,529,
 1012985,679,72420352,42752,585903,841,64,961,
 118375,1285,2944,179503,4624625,1369]