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A197424 as a simple table

na(n)
04
136
2225
31600
410816
574529
6509796
73496900
823961025
9164249856
101125736704
117716041281
1252886200900
13362488284900
142484529385121
1517029223715904
16116720020119616
17800010960336225
185483356589096100
1937583485459535236
20257601040852192129

[4,36,225,1600,10816,74529,509796,3496900,
 23961025,164249856,1125736704,7716041281,
 52886200900,362488284900,2484529385121,
 17029223715904,116720020119616,800010960336225,
 5483356589096100,37583485459535236,
 257601040852192129]