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A207009 as a simple table

na(n)
19
281
3529
43721
525921
6180625
71256641
88743849
960855601
10423577561
112948164209
1220519130025
13142812189025
14993971114361
156918041467089
1648149568342121
17335120802753025
182332439189580889
1916233767034063601

[9,81,529,3721,25921,180625,1256641,8743849,
 60855601,423577561,2948164209,20519130025,
 142812189025,993971114361,6918041467089,
 48149568342121,335120802753025,2332439189580889,
 16233767034063601]