login

A053868 as a simple table

na(n)
12
23
34
45
57
68
711
813
915
1016
1117
1218
1319
1421
1523
1627
1729
1831
1932
2033
2135
2236
2337
2439
2541
2643
2745
2847
2950
3051
3153
3255
3357
3459
3561
3663
3764
3865
3967
4069
4171
4272
4373
4475
4577
4679
4783
4885
4987
5089
5191
5293
5395
5497
5598
5699
57100
58101
59103
60105
61107
62109
63111
64113
65115
66117
67119

[2,3,4,5,7,8,11,13,15,16,17,18,19,21,23,27,29,31,
 32,33,35,36,37,39,41,43,45,47,50,51,53,55,57,59,
 61,63,64,65,67,69,71,72,73,75,77,79,83,85,87,89,
 91,93,95,97,98,99,100,101,103,105,107,109,111,113,
 115,117,119]