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A027975 as a simple table

na(n)
01
11
24
35
48
512
616
723
831
942
1057
1176
12102
13136
14181
15241
16320
17425
18564
19748
20992
211315
221743
232310
243061
254056
265374
277120
289433
2912497
3016556
3121933
3229056
3338492
3450992
3567551
3689487
37118546
38157041
39208036
40275590
41365080
42483629
43640673
44848712
451124305
461489388
471973020

[1,1,4,5,8,12,16,23,31,42,57,76,102,136,181,241,
 320,425,564,748,992,1315,1743,2310,3061,4056,5374,
 7120,9433,12497,16556,21933,29056,38492,50992,
 67551,89487,118546,157041,208036,275590,365080,
 483629,640673,848712,1124305,1489388,1973020]