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A278950 as a simple table

na(n)
21
31
41
51
61
71
81
91
102
112
122
132
142
152
162
173
182
193
203
213
223
233
243
254
264
274
284
293
303
315
325
335
345
356
365
376
386
396
406
416
426
437
446
456
465
477
488
498
507
517
527
536
547
558
568
578
587
598
607
617
628
639
649
659
668
6710
6810
6911
7011
7110
7211
7311
7411
7511
7611
7711
7811
7911
8012
8112
8212
8313
8412
8512
8612
8712
8812
8912
9011
9111
9212
9313
9412
9513
9612
9713
9813
9913
10015
10115
10216
10316
10416
10515
10615
10716
10816
10916
11015
11115
11215
11315
11414
11515
11616
11715
11815
11915
12015
12114
12215
12315
12415
12516
12616
12716
12817
12918

[1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,3,2,3,3,3,3,3,3,4,
 4,4,4,3,3,5,5,5,5,6,5,6,6,6,6,6,6,7,6,6,5,7,8,8,7,
 7,7,6,7,8,8,8,7,8,7,7,8,9,9,9,8,10,10,11,11,10,11,
 11,11,11,11,11,11,11,12,12,12,13,12,12,12,12,12,
 12,11,11,12,13,12,13,12,13,13,13,15,15,16,16,16,
 15,15,16,16,16,15,15,15,15,14,15,16,15,15,15,15,
 14,15,15,15,16,16,16,17,18]