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 | 9 |
| 2 | 99 |
| 3 | 657 |
| 4 | 909 |
| 5 | 1233 |
| 6 | 11169 |
| 7 | 13833 |
| 8 | 19503 |
| 9 | 20961 |
| 10 | 23661 |
| 11 | 51291 |
| 12 | 69921 |
| 13 | 90009 |
| 14 | 99297 |
| 15 | 109737 |
| 16 | 139329 |
| 17 | 203841 |
| 18 | 237169 |
| 19 | 256059 |
| 20 | 321201 |
| 21 | 339021 |
| 22 | 346473 |
| 23 | 460251 |
| 24 | 475641 |
| 25 | 686169 |
| 26 | 760761 |
| 27 | 927081 |
| 28 | 1080801 |
| 29 | 1621089 |
| 30 | 1679931 |
| 31 | 3100833 |
| 32 | 3316941 |
| 33 | 3845601 |
| 34 | 3846051 |
| 35 | 3942657 |
| 36 | 4095081 |
| 37 | 4281057 |