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A061578 as a simple table

na(n)
11
24
35
46
58
69
710
811
913
1014
1115
1216
1317
1419
1520
1621
1722
1823
1924
2025
2127
2228
2329
2430
2531
2632
2733
2834
2936
3037
3138
3239
3340
3441
3542
3643
3744
3846
3947
4048
4149
4250
4351
4452
4553
4654
4755
4857
4958
5059
5160
5261
5362
5463
5564
5665
5766
5867
5968
6070
6171
6272
6373
6474
6575
6676
6777
6878
6979
7080
7181

[1,4,5,6,8,9,10,11,13,14,15,16,17,19,20,21,22,23,
 24,25,27,28,29,30,31,32,33,34,36,37,38,39,40,41,
 42,43,44,46,47,48,49,50,51,52,53,54,55,57,58,59,
 60,61,62,63,64,65,66,67,68,70,71,72,73,74,75,76,
 77,78,79,80,81]