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A158979 as a simple table

na(n)
12
23
34
45
58
67
710
89
910
1013
1116
1213
1314
1415
1522
1617
1720
1823
1924
2029
2138
2229
2326
2441
2526
2627
2728
2833
2934
3037
3132
3237
3334
3435
3552
3637
3738
3839
3946
4041
4150
4253
4344
4447
4558
4655
4750
4849
4960
5061
5162
5261
5356
5455
5558
5659
5768
5861
5962
6073
6166
6277
6364
6467
6584
6671

[2,3,4,5,8,7,10,9,10,13,16,13,14,15,22,17,20,23,
 24,29,38,29,26,41,26,27,28,33,34,37,32,37,34,35,
 52,37,38,39,46,41,50,53,44,47,58,55,50,49,60,61,
 62,61,56,55,58,59,68,61,62,73,66,77,64,67,84,71]