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A004733 as a simple table

na(n)
03
18
215
316
4105
5128
6315
7256
83465
91024
109009
112048
1245045
1332768
14109395
1565536
162078505
17262144
184849845
19524288
2022309287
214194304
2250702925
238388608
24456326325
2533554432
261017958725
2767108864

[3,8,15,16,105,128,315,256,3465,1024,9009,2048,
 45045,32768,109395,65536,2078505,262144,4849845,
 524288,22309287,4194304,50702925,8388608,
 456326325,33554432,1017958725,67108864]