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 | 0 |
| 2 | 7 |
| 3 | 919 |
| 4 | 999 |
| 5 | 25352 |
| 6 | 27872 |
| 7 | 31213 |
| 8 | 37973 |
| 9 | 45054 |
| 10 | 53135 |
| 11 | 54845 |
| 12 | 56765 |
| 13 | 60606 |
| 14 | 62426 |
| 15 | 63936 |
| 16 | 74347 |
| 17 | 75357 |
| 18 | 78687 |
| 19 | 86868 |
| 20 | 90909 |
| 21 | 98289 |
| 22 | 121121 |
| 23 | 757757 |
| 24 | 982289 |
| 25 | 999999 |
| 26 | 1063601 |
| 27 | 1081801 |
| 28 | 1188811 |
| 29 | 1197911 |
| 30 | 1366631 |
| 31 | 1393931 |
| 32 | 1507051 |
| 33 | 1644461 |
| 34 | 1727271 |
| 35 | 1889881 |