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A234589 as a simple table

na(n)
01
12
24
38
416
532
664
7128
8255
9508
101012
112016
124016
138000
1415937
1531749
1663249
17126002
18251016
19500064
20996207
211984602
223953641
237876278
2415690791
2531258536
2662271945
27124055559
28247138286
29492338537
30980816202
311953940937
323892559256
337754593434
3415448376086
3530775607480
3661309875581
37122138964964

[1,2,4,8,16,32,64,128,255,508,1012,2016,4016,8000,
 15937,31749,63249,126002,251016,500064,996207,
 1984602,3953641,7876278,15690791,31258536,
 62271945,124055559,247138286,492338537,980816202,
 1953940937,3892559256,7754593434,15448376086,
 30775607480,61309875581,122138964964]