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A072076 as a simple table

na(n)
02
122
2250
33750
441250
5414150
64166250
742281250
8438281250
94400343750
1044266406250
11449238281250
124510352343750
1345373066406250
14455545586718750
154555455867187500
1645555287544813750
17455552875448137500
184566844506855468750
1945668445068554687500

[2,22,250,3750,41250,414150,4166250,42281250,
 438281250,4400343750,44266406250,449238281250,
 4510352343750,45373066406250,455545586718750,
 4555455867187500,45555287544813750,
 455552875448137500,4566844506855468750,
 45668445068554687500]