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A232731 as a simple table

n a(n)
1 4
2 50
3 450
4 4590
5 45405
6 454950
7 4544550
8 45454500
9 454495500
10 4545045000
11 45449955000
12 454500450000
13 4544999550000
14 45450004500000
15 454499995500000
16 4545000045000000
17 45449999955000000
18 454500000450000000
19 4544999999550000000
20 45450000004500000000

[4,50,450,4590,45405,454950,4544550,45454500,
 454495500,4545045000,45449955000,454500450000,
 4544999550000,45450004500000,454499995500000,
 4545000045000000,45449999955000000,
 454500000450000000,4544999999550000000,
 45450000004500000000]

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Last modified July 2 16:02 EDT 2020. Contains 335404 sequences. (Running on oeis4.)