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A199319 as a simple table

na(n)
05
125
2145
3865
45185
531105
6186625
71119745
86718465
940310785
10241864705
111451188225
128707129345
1352242776065
14313456656385
151880739938305
1611284439629825
1767706637778945
18406239826673665
192437438960041985
2014624633760251905

[5,25,145,865,5185,31105,186625,1119745,6718465,
 40310785,241864705,1451188225,8707129345,
 52242776065,313456656385,1880739938305,
 11284439629825,67706637778945,406239826673665,
 2437438960041985,14624633760251905]