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A080781 as a simple table

na(n)
11
25
39
413
512
616
720
824
923
1027
1131
1230
1329
1433
1537
1636
1740
1844
1948
2047
2151
2255
2354

[1,5,9,13,12,16,20,24,23,27,31,30,29,33,37,36,40,
 44,48,47,51,55,54]