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A291478 as a simple table

na(n)
137
237
337
428
535
637
77
88
99
1010
1111
1212
1313
147
1515
168
1717
189
1919
2010
217
2211
2323
248
2525
2613
279
287
2929
3010
3131
328
3311
3417
357
369
3737
3819
3913
408
4137
427
4337
4411
459
4623
4737
488
497
5010
5117
5213
5337
549
5511
567
5719
5829
5937
6010
6137
6231
637
648
6513
6611
6737
6817
6923
707

[37,37,37,28,35,37,7,8,9,10,11,12,13,7,15,8,17,9,
 19,10,7,11,23,8,25,13,9,7,29,10,31,8,11,17,7,9,37,
 19,13,8,37,7,37,11,9,23,37,8,7,10,17,13,37,9,11,7,
 19,29,37,10,37,31,7,8,13,11,37,17,23,7]