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A133212 as a simple table

na(n)
01
14
212
332
472
5144
6272
7512
8992
91984
104032
118192
1216512
1333024
1465792
15131072
16261632
17523264
181047552
192097152
204196352
218392704
2216781312
2333554432
2467100672
25134201344
26268419072
27536870912
281073774592
292147549184

[1,4,12,32,72,144,272,512,992,1984,4032,8192,
 16512,33024,65792,131072,261632,523264,1047552,
 2097152,4196352,8392704,16781312,33554432,
 67100672,134201344,268419072,536870912,1073774592,
 2147549184]