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A056450 as a simple table

na(n)
01
14
24
316
416
564
664
7256
8256
91024
101024
114096
124096
1316384
1416384
1565536
1665536
17262144
18262144
191048576
201048576
214194304
224194304
2316777216
2416777216
2567108864
2667108864
27268435456
28268435456
291073741824
301073741824
314294967296

[1,4,4,16,16,64,64,256,256,1024,1024,4096,4096,
 16384,16384,65536,65536,262144,262144,1048576,
 1048576,4194304,4194304,16777216,16777216,
 67108864,67108864,268435456,268435456,1073741824,
 1073741824,4294967296]