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A287392 as a simple table

na(n)
00
11
21
31
41
51
64
74
84
94
104
119
129
139
149
159
1616
1716
1816
1916
2016
2125
2225
2325
2425
2525
2636
2736
2836
2936
3036
3149
3249
3349
3449
3549
3664
3764
3864
3964
4064
4181
4281
4381
4481
4581
46100
47100
48100
49100
50100
51121
52121
53121
54121
55121
56144
57144
58144
59144
60144
61169
62169
63169

[0,1,1,1,1,1,4,4,4,4,4,9,9,9,9,9,16,16,16,16,16,
 25,25,25,25,25,36,36,36,36,36,49,49,49,49,49,64,
 64,64,64,64,81,81,81,81,81,100,100,100,100,100,
 121,121,121,121,121,144,144,144,144,144,169,169,
 169]