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A179809 as a simple table

na(n)
40
51
60
725
80
9289
100
112025
120
1316641
140
15145161
160
171185921
180
199715689
200
2180874049
220
23668377609
240
255516478529
260
2745630513769
280
29377252695681
300
313117897783049
320
3325774558228225
340
35213069752354281
360
371761278190732225
380
3914559352270703881

[0,1,0,25,0,289,0,2025,0,16641,0,145161,0,1185921,
 0,9715689,0,80874049,0,668377609,0,5516478529,0,
 45630513769,0,377252695681,0,3117897783049,0,
 25774558228225,0,213069752354281,0,
 1761278190732225,0,14559352270703881]