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A293352 as a simple table

na(n)
00
11
22
34
49
518
636
773
8147
9295
10591
111182
122364
134728
149457
1518914
1637828
1775656
18151313
19302627
20605254
211210508
222421017
234842035
249684071
2519368143
2638736287
2777472575
28154945150
29309890300
30619780600
311239561201
322479122403
334958244806
349916489613

[0,1,2,4,9,18,36,73,147,295,591,1182,2364,4728,
 9457,18914,37828,75656,151313,302627,605254,
 1210508,2421017,4842035,9684071,19368143,38736287,
 77472575,154945150,309890300,619780600,1239561201,
 2479122403,4958244806,9916489613]