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A232731 as a simple table

na(n)
14
250
3450
44590
545405
6454950
74544550
845454500
9454495500
104545045000
1145449955000
12454500450000
134544999550000
1445450004500000
15454499995500000
164545000045000000
1745449999955000000
18454500000450000000
194544999999550000000
2045450000004500000000

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