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 | 11 |
| 2 | 21 |
| 3 | 31 |
| 4 | 401 |
| 5 | 501 |
| 6 | 601 |
| 7 | 701 |
| 8 | 801 |
| 9 | 901 |
| 10 | 10001 |
| 11 | 11001 |
| 12 | 12001 |
| 13 | 13001 |
| 14 | 14001 |
| 15 | 15001 |
| 16 | 16001 |
| 17 | 17001 |
| 18 | 18001 |
| 19 | 19001 |
| 20 | 20001 |
| 21 | 21001 |
| 22 | 22001 |
| 23 | 23001 |
| 24 | 24001 |
| 25 | 25001 |
| 26 | 26001 |
| 27 | 27001 |
| 28 | 28001 |
| 29 | 29001 |
| 30 | 30001 |
| 31 | 31001 |
| 32 | 320001 |
| 33 | 330001 |
| 34 | 340001 |
| 35 | 350001 |
| 36 | 360001 |
| 37 | 370001 |
| 38 | 380001 |
| 39 | 390001 |