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A266603 as a simple table

na(n)
10
21
33
45
53
613
79
815
921
1029
113
1233
1345
1421
1539
1645
1769
1899
19105
20111
2115
2227
2357
2475
2593
26117
27153
28177
29183
30243
31253
329
3345
3481
35129
36165
37231
38249
39261
40285
41315
42345
43375
44399
45441
46459
47465
48471
49501

[0,1,3,5,3,13,9,15,21,29,3,33,45,21,39,45,69,99,
 105,111,15,27,57,75,93,117,153,177,183,243,253,9,
 45,81,129,165,231,249,261,285,315,345,375,399,441,
 459,465,471,501]