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A178152 as a simple table

na(n)
20
31
41
51
63
74
83
94
107
116
129
1310
149
159
1613
1710
1815
1915
2014
2118
2217
2316
2422
2524
2625
2723
2822
2927
3028
3129
3225
3334
3430
3537
3634
3739
3839
3936
4043
4137
4245
4341
4448
4549
4645
4748
4852
4949
5057
5158
5252
5360
5452
5564
5659
5767
5862
5969
6070
6166
6273
6372
6468
6578
6679
6778
6884
6979
7087
7188
7280
7387
7493
7590

[0,1,1,1,3,4,3,4,7,6,9,10,9,9,13,10,15,15,14,18,
 17,16,22,24,25,23,22,27,28,29,25,34,30,37,34,39,
 39,36,43,37,45,41,48,49,45,48,52,49,57,58,52,60,
 52,64,59,67,62,69,70,66,73,72,68,78,79,78,84,79,
 87,88,80,87,93,90]