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A154890 as a simple table

na(n)
03
16
24
38
48
516
624
748
888
9176
10344
11688
121368
132736
145464
1510928
1621848
1743696
1887384
19174768
20349528
21699056
221398104
232796208
245592408
2511184816
2622369624
2744739248
2889478488
29178956976
30357913944
31715827888
321431655768
332863311536
345726623064

[3,6,4,8,8,16,24,48,88,176,344,688,1368,2736,5464,
 10928,21848,43696,87384,174768,349528,699056,
 1398104,2796208,5592408,11184816,22369624,
 44739248,89478488,178956976,357913944,715827888,
 1431655768,2863311536,5726623064]