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A249859 as a simple table

na(n)
13
20
35
46
521
68
745
830
977
1024
11117
1270
13165
1448
15221
16126
17285
1880
19357
20198
21437
22120
23525
24286
25621
26168
27725
28390
29837
30224
31957
32510
331085
34288
351221
36646
371365
38360
391517
40798
411677
42440
431845
44966
452021
46528
472205
481150
492397
50624
512597
521350
532805

[3,0,5,6,21,8,45,30,77,24,117,70,165,48,221,126,
 285,80,357,198,437,120,525,286,621,168,725,390,
 837,224,957,510,1085,288,1221,646,1365,360,1517,
 798,1677,440,1845,966,2021,528,2205,1150,2397,624,
 2597,1350,2805]