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A274931 as a simple table

na(n)
01
16
25
312
416
517
621
724
827
913
1015
1136
1240
1343
1447
1554
1623
1756
1859
1962
2039
2168
2269
2335
2446
2537
2642
2790
2850
2997
3094
3199
32102
3357
34107
35115
36117
37116
38120
3966
40130
41131
4273
4377
44140
45143
4676
4780
4878
49159
50161
51156
52165
5392
5491
55174
5689
57181
58104
59187
60190

[1,6,5,12,16,17,21,24,27,13,15,36,40,43,47,54,23,
 56,59,62,39,68,69,35,46,37,42,90,50,97,94,99,102,
 57,107,115,117,116,120,66,130,131,73,77,140,143,
 76,80,78,159,161,156,165,92,91,174,89,181,104,187,
 190]