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A070240 as a simple table

na(n)
11
22
35
49
510
611
716
817
919
1021
1122
1223
1325
1426
1527
1629
1733
1834
1935
2037
2141
2243
2345
2446
2547

[1,2,5,9,10,11,16,17,19,21,22,23,25,26,27,29,33,
 34,35,37,41,43,45,46,47]