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A278067 as a simple table

na(n)
137
22
337
42
537
62
737
82
937
102
1137
122
1337
142
1537
162
1737
182
1937
202
2137
222
2337
242
2537
262
2737
282
2937
302
3137
322
3337
342
3537
362
3737
3839
392
4076
412
4276
432
4476
452
4676
472
4876
492
5076
512
5276
532
5476
552
5676
572
5876
592
6076
612
6276
632
6476
652
6676
672
6876
692
7076
712
7276
732
7476
752
7676
7739

[37,2,37,2,37,2,37,2,37,2,37,2,37,2,37,2,37,2,37,
 2,37,2,37,2,37,2,37,2,37,2,37,2,37,2,37,2,37,39,2,
 76,2,76,2,76,2,76,2,76,2,76,2,76,2,76,2,76,2,76,2,
 76,2,76,2,76,2,76,2,76,2,76,2,76,2,76,2,76,39]