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A331400 as a simple table

na(n)
12
23
34
45
56
67
78
89
910
1012
1114
1216
1318
1420
1522
1624
1726
1827
1929
2030
2132
2233
2335
2436
2538
2639
2741
2842
2944
3045
3147
3248
3350
3452
3554
3656
3758
3860
3962
4064
4166
4268
4370
4472
4574
4676
4778
4880
4982
5083
5184
5285
5387
5488
5589
5690
5792
5893
5994
6095
6197
6298
6399
64100
65102
66103
67104
68105
69107
70108
71109
72110
73112
74113
75114
76115

[2,3,4,5,6,7,8,9,10,12,14,16,18,20,22,24,26,27,29,
 30,32,33,35,36,38,39,41,42,44,45,47,48,50,52,54,
 56,58,60,62,64,66,68,70,72,74,76,78,80,82,83,84,
 85,87,88,89,90,92,93,94,95,97,98,99,100,102,103,
 104,105,107,108,109,110,112,113,114,115]