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A017989 as a simple table

na(n)
01
12
23
35
49
515
625
743
873
9125
10214
11366
12625
131069
141828
153125
165344
179138
1815625
1926718
2045688
2178125
22133592
23228439
24390625
25667959
261142194
271953125
283339797
295710972
309765625
3116698984
3228554861
3348828125
3483494919
35142774304
36244140625
37417474596

[1,2,3,5,9,15,25,43,73,125,214,366,625,1069,1828,
 3125,5344,9138,15625,26718,45688,78125,133592,
 228439,390625,667959,1142194,1953125,3339797,
 5710972,9765625,16698984,28554861,48828125,
 83494919,142774304,244140625,417474596]