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A145115 as a simple table

na(n)
01
12
24
38
416
532
664
7128
8256
9511
101019
112031
124047
138063
1416063
1531999
1663743
17126976
18252934
19503838
201003630
211999198
223982334
237932670
2415801598
2531476221
2662699509
27124895181
28248786733
29495574269
30987166205
311966399741
323916997885
337802519550

[1,2,4,8,16,32,64,128,256,511,1019,2031,4047,8063,
 16063,31999,63743,126976,252934,503838,1003630,
 1999198,3982334,7932670,15801598,31476221,
 62699509,124895181,248786733,495574269,987166205,
 1966399741,3916997885,7802519550]