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A169967 as a simple table

na(n)
10
24
340
444
5400
6404
7440
8444
94000
104004
114040
124044
134400
144404
154440
164444
1740000
1840004
1940040
2040044
2140400
2240404
2340440
2440444
2544000
2644004
2744040
2844044
2944400
3044404
3144440
3244444
33400000
34400004
35400040
36400044
37400400
38400404
39400440
40400444

[0,4,40,44,400,404,440,444,4000,4004,4040,4044,
 4400,4404,4440,4444,40000,40004,40040,40044,40400,
 40404,40440,40444,44000,44004,44040,44044,44400,
 44404,44440,44444,400000,400004,400040,400044,
 400400,400404,400440,400444]