login

A171087 as a simple table

na(n)
12
21
34
46
53
65
77
88
99
1011
1113
1215
1317
1410
1519
1621
1712
1823
1925
2027
2129
2214
2331
2433
2535
2637
2739
2841
2916
3043
3145
3247
3349
3451
3553
3655
3718
3857
3959
4061
4163
4265
4367
4469
4571
4620
4773
4875
4977
5079
5181
5283
5385
5487
5589
5691
5722
5893
5995
6097
6199
62101
63103
64105
65107
66109
67111
68113
69115
7024

[2,1,4,6,3,5,7,8,9,11,13,15,17,10,19,21,12,23,25,
 27,29,14,31,33,35,37,39,41,16,43,45,47,49,51,53,
 55,18,57,59,61,63,65,67,69,71,20,73,75,77,79,81,
 83,85,87,89,91,22,93,95,97,99,101,103,105,107,109,
 111,113,115,24]