login

A160180 as a simple table

na(n)
12
23
34
43
55
66
77
85
98
109
1110
127
1311
1412
155
1613
179
1814
1915
2016
2111
2217
237
2418
2519
2613
2720
2821
2922
3015
3123
3224
337
3425
3517
3626
3727
3811
3928
4019
4129
4230
4331
4421
4532
4613
4733
4834
4923
5035
5136
5237
5325
5438
5511
5639
5740
5827
5941
6042
6117
6243
6329
6444
6545
6613
6746
6831
6947
7019
7148
7249
7333
7450
7551
7652

[2,3,4,3,5,6,7,5,8,9,10,7,11,12,5,13,9,14,15,16,
 11,17,7,18,19,13,20,21,22,15,23,24,7,25,17,26,27,
 11,28,19,29,30,31,21,32,13,33,34,23,35,36,37,25,
 38,11,39,40,27,41,42,17,43,29,44,45,13,46,31,47,
 19,48,49,33,50,51,52]