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A308307 as a simple table

na(n)
10
20
31
40
51
61
72
81
93
102
114
122
135
143
157
164
178
186
199
208
2111
228
2313
2410
2515
2613
2718
2815
2919
3017
3123
3219
3324
3420
3528
3626
3732
3828
3935
4032
4140
4236
4343
4438
4544
4640
4750
4846
4954
5049
5157
5252
5360
5456
5566
5658
5769
5866
5978
6072
6180
6276
6389
6483
6593
6688
6799
6891
69100
7096

[0,0,1,0,1,1,2,1,3,2,4,2,5,3,7,4,8,6,9,8,11,8,13,
 10,15,13,18,15,19,17,23,19,24,20,28,26,32,28,35,
 32,40,36,43,38,44,40,50,46,54,49,57,52,60,56,66,
 58,69,66,78,72,80,76,89,83,93,88,99,91,100,96]