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A311991 as a simple table

na(n)
01
14
28
313
417
523
627
731
836
938
1045
1149
1255
1357
1464
1562
1673
1775
1883
1983
2092
2186
22101
23101
24111
25109
26120
27110
28129
29127
30139
31135
32148
33134
34157
35153
36167
37161
38176
39158
40185
41179
42195
43187
44204
45182
46213
47205
48223
49213

[1,4,8,13,17,23,27,31,36,38,45,49,55,57,64,62,73,
 75,83,83,92,86,101,101,111,109,120,110,129,127,
 139,135,148,134,157,153,167,161,176,158,185,179,
 195,187,204,182,213,205,223,213]