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A340849 as a simple table

na(n)
00
11
23
35
49
515
627
749
893
9179
10351
11693
121377
132743
145475
1510937
1621861
1743707
1887399
19174781
20349545
21699071
221398123
232796225
245592429
2511184835
2622369647
2744739269
2889478513
29178956999
30357913971
31715827913

[0,1,3,5,9,15,27,49,93,179,351,693,1377,2743,5475,
 10937,21861,43707,87399,174781,349545,699071,
 1398123,2796225,5592429,11184835,22369647,
 44739269,89478513,178956999,357913971,715827913]