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A293336 as a simple table

na(n)
00
11
22
34
47
514
629
757
8114
9229
10458
11916
121832
133664
147327
1514654
1629309
1758617
18117234
19234469
20468937
21937875
221875750
233751500
247502999
2515005998
2630011996
2760023993
28120047985
29240095971
30480191942
31960383883
321920767767
333841535534
347683071068

[0,1,2,4,7,14,29,57,114,229,458,916,1832,3664,
 7327,14654,29309,58617,117234,234469,468937,
 937875,1875750,3751500,7502999,15005998,30011996,
 60023993,120047985,240095971,480191942,960383883,
 1920767767,3841535534,7683071068]