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A027827 as a simple table

na(n)
16
28
312
415
516
617
718
820
921
1025
1128
1229
1331
1432
1535
1637
1738
1839
1941
2042
2143
2249
2350
2451
2552
2654
2756
2858
2959
3061
3162
3264
3372
3474
3575
3678
3781
3882
3983
4084
4185
4287
4394
4496
4598
46104
47105
48107
49108
50109
51116
52117
53118
54119
55125
56127
57128
58129
59130
60131
61138
62140
63148

[6,8,12,15,16,17,18,20,21,25,28,29,31,32,35,37,38,
 39,41,42,43,49,50,51,52,54,56,58,59,61,62,64,72,
 74,75,78,81,82,83,84,85,87,94,96,98,104,105,107,
 108,109,116,117,118,119,125,127,128,129,130,131,
 138,140,148]