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A098451 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1819
1920
2023
2143

[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,19,20,
 23,43]