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A136023 as a simple table

na(n)
15
247
3499
44999
549999
6499979
74999999
849999991
9499999993
104999999937
1149999999967
12499999999979
134999999999937
1449999999999981
15499999999999999
164999999999999997
1749999999999999993
18499999999999999931
194999999999999999963
2049999999999999999951

[5,47,499,4999,49999,499979,4999999,49999991,
 499999993,4999999937,49999999967,499999999979,
 4999999999937,49999999999981,499999999999999,
 4999999999999997,49999999999999993,
 499999999999999931,4999999999999999963,
 49999999999999999951]