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A107584 as a simple table

na(n)
01
10
28
352
4240
51004
64072
716356
865504
9262108
101048536
114194260
1216777168
1367108812
14268435400
151073741764
164294967232
1717179869116
1868719476664
19274877906868
201099511627696
214398046511020
2217592186044328
2370368744177572
24281474976710560
251125899906842524

[1,0,8,52,240,1004,4072,16356,65504,262108,
 1048536,4194260,16777168,67108812,268435400,
 1073741764,4294967232,17179869116,68719476664,
 274877906868,1099511627696,4398046511020,
 17592186044328,70368744177572,281474976710560,
 1125899906842524]