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A213205 as a simple table

na(n)
11
25
34
42
53
66
710
89
914
1013
117
128
1311
1412
1515
1619
1718
1823
1922
2027
2126
2216
2317
2420
2521
2624
2725
2828
2932
3031
3136
3235
3340
3439
3544
3643
3729
3830
3933
4034
4137
4238
4341
4442
4545
4649
4748
4853
4952
5057
5156
5261
5360
5465
5564
5646
5747
5850
5951
6054
6155
6258
6359
6462
6563
6666
6770

[1,5,4,2,3,6,10,9,14,13,7,8,11,12,15,19,18,23,22,
 27,26,16,17,20,21,24,25,28,32,31,36,35,40,39,44,
 43,29,30,33,34,37,38,41,42,45,49,48,53,52,57,56,
 61,60,65,64,46,47,50,51,54,55,58,59,62,63,66,70]