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A047281 as a simple table

na(n)
10
23
36
47
510
613
714
817
920
1021
1124
1227
1328
1431
1534
1635
1738
1841
1942
2045
2148
2249
2352
2455
2556
2659
2762
2863
2966
3069
3170
3273
3376
3477
3580
3683
3784
3887
3990
4091
4194
4297
4398
44101
45104
46105
47108
48111
49112
50115
51118
52119
53122
54125
55126
56129
57132
58133
59136
60139
61140

[0,3,6,7,10,13,14,17,20,21,24,27,28,31,34,35,38,
 41,42,45,48,49,52,55,56,59,62,63,66,69,70,73,76,
 77,80,83,84,87,90,91,94,97,98,101,104,105,108,111,
 112,115,118,119,122,125,126,129,132,133,136,139,
 140]