login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A026505 as a simple table

na(n)
11
23
34
45
56
67
78
89
910
1011
1112
1213
1314
1415
1516
1617
1718
1820
1921
2022
2124
2225
2326
2428
2530
2632
2733
2836
2937
3038
3140
3242
3345
3446
3548
3650
3752
3856
3957
4058
4160
4266
4370
4472
4573
4678
4780
4885
4986
5088
5193
52100
53102
54105
55106
56112
57120
58122
59130
60133
61136
62148
63150
64158
65165
66168
67177
68190

[1,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,20,21,
 22,24,25,26,28,30,32,33,36,37,38,40,42,45,46,48,
 50,52,56,57,58,60,66,70,72,73,78,80,85,86,88,93,
 100,102,105,106,112,120,122,130,133,136,148,150,
 158,165,168,177,190]