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A068577 as a simple table

na(n)
12
23
34
46
58
69
710
812
914
1015
1116
1218
1320
1421
1522
1624
1726
1828
1930
2032
2136
2240
2342
2444
2545
2648
2750
2852
2954
3056
3160
3264
3366
3468
3570
3672
3778
3880
3984
4088
4190
4296
43100
44102
45104
46105
47108
48110
49112
50114
51120
52126
53130
54132
55138
56140
57144
58150
59154
60156
61160
62162
63168

[2,3,4,6,8,9,10,12,14,15,16,18,20,21,22,24,26,28,
 30,32,36,40,42,44,45,48,50,52,54,56,60,64,66,68,
 70,72,78,80,84,88,90,96,100,102,104,105,108,110,
 112,114,120,126,130,132,138,140,144,150,154,156,
 160,162,168]