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A254335 as a simple table

na(n)
01
15
225
3205
41025
55205
642025
7214205
81483025
99023205
1045124025
11346032205
121850165025
1313411241205
1475057010025
15391445050205
163161345251025
1716210847055205
18121454355292025
19648483937264205
203404031807133025
2125020163036073205
22141141223300374025
231105826524503082205
245545214234515415025

[1,5,25,205,1025,5205,42025,214205,1483025,
 9023205,45124025,346032205,1850165025,13411241205,
 75057010025,391445050205,3161345251025,
 16210847055205,121454355292025,648483937264205,
 3404031807133025,25020163036073205,
 141141223300374025,1105826524503082205,
 5545214234515415025]