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A309571 as a simple table

na(n)
11
22
34
48
516
615
79
810
95
1014
1113
1213
1318
1417
1513
1614
1711
1812
199
2010
2118
2217
2324
2423
2526
2625
2721
2822
2921
3022
3124
3215
3316
3416
3515
367
378
381
39-1
40-5
41-7
42-4
43-2
444
456
461
47-1
480
492
504
516
525
533
541
55-1
56-5
57-4
58-9
59-8
60-2
61-3
62-9
63-8
64-13
65-6
662
671
682
69-3
704
718
7210
7314
7420
7519
7620
7720

[1,2,4,8,16,15,9,10,5,14,13,13,18,17,13,14,11,12,
 9,10,18,17,24,23,26,25,21,22,21,22,24,15,16,16,15,
 7,8,1,-1,-5,-7,-4,-2,4,6,1,-1,0,2,4,6,5,3,1,-1,-5,
 -4,-9,-8,-2,-3,-9,-8,-13,-6,2,1,2,-3,4,8,10,14,20,
 19,20,20]