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A005578 as a simple table

na(n)
01
11
22
33
46
511
622
743
886
9171
10342
11683
121366
132731
145462
1510923
1621846
1743691
1887382
19174763
20349526
21699051
221398102
232796203
245592406
2511184811
2622369622
2744739243
2889478486
29178956971
30357913942
31715827883
321431655766

[1,1,2,3,6,11,22,43,86,171,342,683,1366,2731,5462,
 10923,21846,43691,87382,174763,349526,699051,
 1398102,2796203,5592406,11184811,22369622,
 44739243,89478486,178956971,357913942,715827883,
 1431655766]