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A003251 as a simple table

na(n)
11
22
33
45
56
67
78
89
910
1012
1113
1214
1316
1417
1518
1619
1720
1821
1923
2024
2125
2227
2328
2430
2531
2632
2734
2835
2936
3037
3138
3239
3341
3442
3543
3645
3746
3847
3948
4049
4150
4252
4353
4454
4555
4656
4757
4859
4960
5061
5163
5264
5365
5466
5567
5668
5770
5871
5972
6074
6175
6277
6378
6479
6581
6682
6783

[1,2,3,5,6,7,8,9,10,12,13,14,16,17,18,19,20,21,23,
 24,25,27,28,30,31,32,34,35,36,37,38,39,41,42,43,
 45,46,47,48,49,50,52,53,54,55,56,57,59,60,61,63,
 64,65,66,67,68,70,71,72,74,75,77,78,79,81,82,83]