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A331801 as a simple table

na(n)
18
212
313
416
517
618
720
821
922
1024
1125
1226
1327
1428
1529
1630
1731
1832
1933
2034
2135
2236
2337
2438
2539
2640
2741
2842
2943
3044
3145
3246
3347
3448
3549
3650
3751
3852
3953
4054
4155
4256
4357
4458
4559
4660
4761
4862
4963
5064
5165
5266
5367
5468
5569
5670
5771
5872
5973
6074
6175
6276
6377
6478
6579
6680
6781
6882
6983
7084
7185

[8,12,13,16,17,18,20,21,22,24,25,26,27,28,29,30,
 31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,
 47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,
 63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,
 79,80,81,82,83,84,85]