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A005081 as a simple table

na(n)
10
20
30
40
5625
60
70
80
90
10625
110
120
1328561
140
15625
160
1783521
180
190
20625
210
220
230
240
25625
2628561
270
280
29707281
30625
310
320
330
3483521
35625
360
371874161
380
3928561
40625
412825761
420
430
440
45625
460
470
480
490
50625
5183521
5228561
537890481
540
55625
560
570
58707281
590
60625
6113845841
620
630
640
6529186
660
670
6883521
690
70625
710
720
7328398241

[0,0,0,0,625,0,0,0,0,625,0,0,28561,0,625,0,83521,
 0,0,625,0,0,0,0,625,28561,0,0,707281,625,0,0,0,
 83521,625,0,1874161,0,28561,625,2825761,0,0,0,625,
 0,0,0,0,625,83521,28561,7890481,0,625,0,0,707281,
 0,625,13845841,0,0,0,29186,0,0,83521,0,625,0,0,
 28398241]