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A002504 as a simple table

na(n)
12
23
34
45
57
610
711
812
914
1015
1118
1224
1325
1426
1528
1629
1731
1833
1935
2038
2139
2242
2343
2446
2549
2650
2753
2856
2959
3063
3164
3267
3368
3475
3581
3682
3787
3889
3991
4092
4194
4296
43106
44109
45120
46124
47126
48129
49130
50137
51141
52143
53148
54154
55157
56158
57159
58165
59166
60171
61172

[2,3,4,5,7,10,11,12,14,15,18,24,25,26,28,29,31,33,
 35,38,39,42,43,46,49,50,53,56,59,63,64,67,68,75,
 81,82,87,89,91,92,94,96,106,109,120,124,126,129,
 130,137,141,143,148,154,157,158,159,165,166,171,
 172]