login

A031942 as a simple table

na(n)
11
22
33
44
56
67
78
89
911
1012
1113
1214
1317
1418
1519
1624
1725
1827
1928
2029
2130
2233
2334
2435
2536
2638
2739
2844
2945
3046
3149
3250
3351
3452
3554
3655
3756
3857
3959
4068
4170
4271
4372
4473
4575
4676
4777
4878
4997
5098
5199
52100
53102
54103
55108
56109
57110
58113
59114
60115

[1,2,3,4,6,7,8,9,11,12,13,14,17,18,19,24,25,27,28,
 29,30,33,34,35,36,38,39,44,45,46,49,50,51,52,54,
 55,56,57,59,68,70,71,72,73,75,76,77,78,97,98,99,
 100,102,103,108,109,110,113,114,115]