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A143182 as a simple table

na(n)
01
12
22
33
41
53
64
72
82
94
105
113
121
133
145
156
164
172
182
194
206
217
225
233
241
253
265
277
288
296
304
312
322
334
346
358
369
377
385
393
401
413
425
437
449
4510
468
476
484
492
502
514
526
538
5410
5511
569
577
585
593
601
613
625
637
649
6511
6612
6710
688
696
704
712
722
734
746
758
7610
7712
7813
7911
809
817
825
833
841
853
865
877
889
8911
9013

[1,2,2,3,1,3,4,2,2,4,5,3,1,3,5,6,4,2,2,4,6,7,5,3,
 1,3,5,7,8,6,4,2,2,4,6,8,9,7,5,3,1,3,5,7,9,10,8,6,
 4,2,2,4,6,8,10,11,9,7,5,3,1,3,5,7,9,11,12,10,8,6,
 4,2,2,4,6,8,10,12,13,11,9,7,5,3,1,3,5,7,9,11,13]