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A254318 as a simple table

na(n)
12
23
34
45
57
610
711
812
913
1014
1115
1216
1317
1418
1519
1620
1721
1823
1924
2025
2128
2229
2331
2432
2535
2636
2737
2839
2941
3043
3146
3247
3349
3450
3553
3654
3758
3859
3961
4064
4167
4269
4371
4472
4573
4679
4781
4883
4989
5092
5193
5297
5398
54100
55101
56103
57104
58105
59106
60107
61109
62113
63116
64119

[2,3,4,5,7,10,11,12,13,14,15,16,17,18,19,20,21,23,
 24,25,28,29,31,32,35,36,37,39,41,43,46,47,49,50,
 53,54,58,59,61,64,67,69,71,72,73,79,81,83,89,92,
 93,97,98,100,101,103,104,105,106,107,109,113,116,
 119]