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A260947 as a simple table

na(n)
10
20
30
40
58
60
710
813
915
1010
1124
1215
1313
1429
1515
168
178
1817
1913
2028
2120
2235
238
2419
2515
2615
2711
287
2924
3017
3129
328
3324
3415
3510
3613
3720
3818
3915
405
418
4228
4347
4415
455
4641
4729
4811
498
5031
5117
5221
5351
5424
5510
5615
5710
5821
5911
6015

[0,0,0,0,8,0,10,13,15,10,24,15,13,29,15,8,8,17,13,
 28,20,35,8,19,15,15,11,7,24,17,29,8,24,15,10,13,
 20,18,15,5,8,28,47,15,5,41,29,11,8,31,17,21,51,24,
 10,15,10,21,11,15]