This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 99 |
| 2 | 110 |
| 3 | 121 |
| 4 | 909 |
| 5 | 929 |
| 6 | 949 |
| 7 | 969 |
| 8 | 989 |
| 9 | 1009 |
| 10 | 1010 |
| 11 | 1029 |
| 12 | 1030 |
| 13 | 1049 |
| 14 | 1050 |
| 15 | 1069 |
| 16 | 1070 |
| 17 | 1089 |
| 18 | 1090 |
| 19 | 1110 |
| 20 | 1130 |
| 21 | 1150 |
| 22 | 1170 |
| 23 | 1190 |
| 24 | 1881 |
| 25 | 2101 |
| 26 | 3223 |
| 27 | 4763 |
| 28 | 9009 |
| 29 | 10010 |
| 30 | 10989 |
| 31 | 11990 |
| 32 | 16236 |
| 33 | 17776 |
| 34 | 18081 |
| 35 | 18281 |
| 36 | 18481 |
| 37 | 18681 |
| 38 | 18881 |
| 39 | 18898 |