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A239501 as a simple table

na(n)
10
20
31
40
50
62
70
81
92
100
113
123
132
142
153
165
174
188
194
205
219
226
2313
2410
2511
2615
2714
2817
2916
3020
3121
3226
3329
3430
3533
3636
3735
3841
3947
4047
4161
4261
4366
4471
4573
4685
4788
4898
49102
50114
51122
52131
53148
54154
55163
56182
57188
58205
59220
60231
61249
62271
63293
64306
65338
66359

[0,0,1,0,0,2,0,1,2,0,3,3,2,2,3,5,4,8,4,5,9,6,13,
 10,11,15,14,17,16,20,21,26,29,30,33,36,35,41,47,
 47,61,61,66,71,73,85,88,98,102,114,122,131,148,
 154,163,182,188,205,220,231,249,271,293,306,338,
 359]