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A028822 as a simple table

na(n)
10
21
34
49
564
681
7100
8400
9441
10841
11900
12961
136400
147744
158100
1610000
1740000
1844100
1984100
2090000
2196100
22640000
23774400
24810000
251000000
264000000
274410000
288410000
298874441
309000000
319610000
329853321
3364000000
3477440000

[0,1,4,9,64,81,100,400,441,841,900,961,6400,7744,
 8100,10000,40000,44100,84100,90000,96100,640000,
 774400,810000,1000000,4000000,4410000,8410000,
 8874441,9000000,9610000,9853321,64000000,77440000]