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A146900 as a simple table

na(n)
01
11
21
31
43
51
61
77
87
91
101
116
129
136
141
151
1611
1715
1815
1911
201
211
229
2331
2430
2531
269
271
281
2915
3043
3171
3271
3343
3415
351
361
3712
3842
3984
40105
4184
4242
4312
441
451
4619
4754
48126
49189
50189
51126
5254
5319
541
551
5615
5791
58180
59315
60378
61315
62180
6391
6415
651

[1,1,1,1,3,1,1,7,7,1,1,6,9,6,1,1,11,15,15,11,1,1,
 9,31,30,31,9,1,1,15,43,71,71,43,15,1,1,12,42,84,
 105,84,42,12,1,1,19,54,126,189,189,126,54,19,1,1,
 15,91,180,315,378,315,180,91,15,1]