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A206255 as a simple table

na(n)
149
2361
3361
41600
58029
61600
79409
899856
999856
109409
1147089
121718209
131364224
141718209
1547089
16258064
1726512201
1849336576
1949336576
2026512201
21258064
221343281
23434613664
24944701696
254556324929
26944701696
27434613664
281343281
297198489

[49,361,361,1600,8029,1600,9409,99856,99856,9409,
 47089,1718209,1364224,1718209,47089,258064,
 26512201,49336576,49336576,26512201,258064,
 1343281,434613664,944701696,4556324929,944701696,
 434613664,1343281,7198489]