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A031198 as a simple table

na(n)
12
26
37
48
511
612
714
815
917
1019
1120
1221
1323
1424
1525
1626
1727
1828
1932
2035
2136
2241
2342
2445
2546
2647
2751
2852
2953
3054
3155
3256
3360
3462
3563
3664
3765
3866
3967
4068
4170
4271
4372
4474
4576
4680
4782
4886
4989
5091
5198
52101
53102
54104
55105
56107
57109
58110
59112
60116
61119
62120
63121

[2,6,7,8,11,12,14,15,17,19,20,21,23,24,25,26,27,
 28,32,35,36,41,42,45,46,47,51,52,53,54,55,56,60,
 62,63,64,65,66,67,68,70,71,72,74,76,80,82,86,89,
 91,98,101,102,104,105,107,109,110,112,116,119,120,
 121]