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A090860 as a simple table

na(n)
424
572
6120
7264
8504
91032
102040
114104
128184
1316392
1432760
1565544
16131064
17262152
18524280
191048584
202097144
214194312
228388600
2316777224
2433554424
2567108872
26134217720
27268435464
28536870904
291073741832
302147483640
314294967304

[24,72,120,264,504,1032,2040,4104,8184,16392,
 32760,65544,131064,262152,524280,1048584,2097144,
 4194312,8388600,16777224,33554424,67108872,
 134217720,268435464,536870904,1073741832,
 2147483640,4294967304]